Black 24-hour fabric task chair featuring a contoured backrest, integrated lumbar pump, adjustable seat slide, and armrests, placed in an industrial-style office with concrete flooring and metal-framed desk.
Black ergonomic office chair with high backrest, cushioned seat, adjustable armrests, and under-seat lever for tilt and height control. Five-wheel base provides mobility for professional or home office use.
Black ergonomic office chair with cushioned seat and backrest, height-adjustable armrests, gas lift mechanism, and tilt lock. Rated to 171kg with a 2-year warranty, designed for heavy-duty use in commercial or home office settings.
Close-up of black office chair highlighting heavy-duty design rated to 27 stone. Features cushioned seat, padded backrest, and adjustable armrest for robust support in high-capacity work environments.
Ergonomic chair with posture-curved seat and padded backrest designed to improve lumbar support. Black finish with armrest shown, suitable for staffrooms, training areas, or extended desk use.
Office chair armrest shown in three vertical positions with 60mm adjustment range. Includes magnified inset of armrest surface, ideal for users seeking customisable arm support in ergonomic seating.
Technical illustration of ergonomic chair with high backrest, cushioned seat, and armrests. Dimensions include seat height 470–600mm, back height 600mm, and arm height from floor 650–850mm. Suitable for ergonomic planning and procurement.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: The "Shift-Worker" Specialist

The Cobolt 24-Hour Fabric Task Chair is the professional choice for environments that never sleep. Supplied with Free UK Mainland Delivery, this chair is built with reinforced mechanisms and high-density foam to withstand the rigours of constant use, backed by an impressive 5-Year Warranty.

Certified Heavy-Duty Performance

  • BS 5459 Compliant: This is the gold standard for 24-hour seating. It certifies that the chair has passed rigorous testing for heavy-duty use, ensuring it remains safe and stable even when used continuously day and night.
  • 150kg Weight Capacity: Built with a heavy-duty gas lift and reinforced base, this chair supports users up to 150kg (approx. 23 stone). This robust capacity makes it an inclusive solution for diverse workforces.
  • 5-Year Warranty: We are so confident in the durability of this chair that we offer a 5-year guarantee, significantly longer than the industry standard for 24-hour seating.

Advanced Customisation

  • Inflatable Lumbar Pump: Unlike fixed supports, this chair features a manual pump bulb. Users can inflate the lumbar zone to provide the exact level of pressure required to support their lower back, then deflate it for the next user.
  • Seat Depth Adjustment (Seat Slide): The seat pad can slide forward or backward. This allows taller users to get full thigh support while shorter users can reduce the depth to prevent circulation cutoff behind the knees.
  • Independent Back Rake: The back angle can be adjusted independently of the seat and locked in multiple positions. Combined with the Weight Tension Control, this allows for a dynamic or fixed seating position.

The Cobolt Commitment

  • Free UK Mainland Delivery: We manage all logistics to provide a transparent, all-inclusive price for your facility management budget.
  • Extra High Back: At 600mm high, the backrest provides full spinal support, crucial for reducing fatigue during long night shifts.
  • Heritage Reliability: Drawing on nearly 50 years of expertise to provide commercial-grade furniture solutions you can trust.

The Specification Choice for Critical Infrastructure

The 24-Hour Fabric Task Chair is primarily specified for roles where failure is not an option. It is the standard for 999/111 Operators and CCTV Monitoring Stations, where staff must remain alert and comfortable for 12-hour stints.

In Transport Logistics Offices, the adjustability allows a single chair to be perfectly tailored to three different drivers or dispatchers over a 24-hour period.

Key Technical Features

  • BS 5459-2:2008 Certified – 24/7 Safety.
  • 150kg Weight Capacity – Heavy duty.
  • Inflatable Lumbar Support – Custom fit.
  • Seat Slide Mechanism – Leg support.
  • Extra High Back (600mm) – Upper back relief.
  • Height Adjustable Arms – Shoulder support.
  • 5-Year Warranty – Long-term value.
Experience icon
50 Years of Excellence
Free delivery icon
Free UK Mainland Delivery
UK Design icon
UK Design

Cobolt Service & Trust: Professional Excellence

  • Free Delivery (UK Mainland): Our all-inclusive pricing model provides budget certainty for procurement teams.
  • Durable Fabric: Upholstered in hard-wearing commercial fabric available in Black or Blue to hide stains and wear.
  • Manufacturer Direct: We stock these high-performance units in the UK for immediate deployment.

Built for Safety. Backed for Years.

  • This chair is rigorously tested to BS 5459-2000+A2:2008. This British Standard specifically covers performance requirements for office pedestal seating for use by persons weighing up to 150kg and for use up to 24 hours a day.
  • The Heavy Duty 5-Star Base provides a wide 670mm footprint, ensuring stability even when reclining fully with the tension control loose.
  • The High-Density Foam used in the seat and back is fire retardant to UK commercial standards and resists collapsing after years of heavy use.
  • The Reinforced Mechanism ensures that the seat slide and back rake adjustments remain secure and do not slip under load.
  • We offer a comprehensive 5-year manufacturer's warranty covering the mechanism and structural components.
Usage
24/7
Capacity
150kg
Warranty
5 Years
Specification
Details
Purpose / Benefit
Overall Height
1050mm - 1180mm
Extra high back
Seat Dimensions
520mm (W) x 500mm (D)
Generous seating area
Seat Height
470mm - 600mm
Wide adjustment range
Back Dimensions
450mm (W) x 600mm (H)
Full spinal support
Arm Height
650mm - 850mm (from floor)
Fits various desks
Lumbar Support
Inflatable Pump
Personalised fit
Seat Depth
Adjustable (Seat Slide)
Leg length support
Compliance
BS 5459-2000+A2:2008
Certified 24H use
Max Capacity
150kg
Heavy duty
Warranty
5 Years
Investment protection

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5-7 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Expert Advice: The Best Heavy-Duty 24-Hour Chair

Q: What is BS 5459 compliance?

A: BS 5459 is a tough British Standard that tests office chairs for structural safety and stability specifically for use by people weighing up to 150kg for 24 hours a day. It is a much higher standard than typical EN 1335 8-hour ratings.

Q: How does the lumbar pump work?

A: There is a small hand bulb (like on a blood pressure cuff) attached to the chair. Squeezing it inflates an air bladder in the lower backrest, increasing support. Pressing the release valve deflates it. This allows precise adjustment for each user.

Q: What is a seat slide?

A: The seat depth adjustment allows you to slide the seat cushion horizontally forward or backward. This ensures that users of different leg lengths can sit with their back against the chair while maintaining a healthy gap behind their knees.

Q: Is it suitable for 24/7 shift work?

A: Yes. This is its primary purpose. It is built to withstand constant use in 3-shift environments like control rooms, where a standard chair would wear out quickly.

Q: What is the maximum weight limit?

A: The chair is certified for users up to 150kg (approx. 23.5 stone), making it one of the most robust chairs in our range.

Q: Are the arms adjustable?

A: Yes. The chair features height-adjustable arms to support your shoulders. They can also be removed during assembly if an armless chair is preferred.

Q: Is assembly difficult?

A: No. It comes flat-packed but includes simple instructions. Because it is a heavy-duty chair, the components are heavier than standard, so two people may find assembly easier.

Q: Is delivery included?

A: Yes, Free UK Mainland Delivery is included. We dispatch via courier to ensure your heavy-duty seating arrives safely.

Overview

Product Overview: The "Shift-Worker" Specialist

The Cobolt 24-Hour Fabric Task Chair is the professional choice for environments that never sleep. Supplied with Free UK Mainland Delivery, this chair is built with reinforced mechanisms and high-density foam to withstand the rigours of constant use, backed by an impressive 5-Year Warranty.

Certified Heavy-Duty Performance

  • BS 5459 Compliant: This is the gold standard for 24-hour seating. It certifies that the chair has passed rigorous testing for heavy-duty use, ensuring it remains safe and stable even when used continuously day and night.
  • 150kg Weight Capacity: Built with a heavy-duty gas lift and reinforced base, this chair supports users up to 150kg (approx. 23 stone). This robust capacity makes it an inclusive solution for diverse workforces.
  • 5-Year Warranty: We are so confident in the durability of this chair that we offer a 5-year guarantee, significantly longer than the industry standard for 24-hour seating.

Advanced Customisation

  • Inflatable Lumbar Pump: Unlike fixed supports, this chair features a manual pump bulb. Users can inflate the lumbar zone to provide the exact level of pressure required to support their lower back, then deflate it for the next user.
  • Seat Depth Adjustment (Seat Slide): The seat pad can slide forward or backward. This allows taller users to get full thigh support while shorter users can reduce the depth to prevent circulation cutoff behind the knees.
  • Independent Back Rake: The back angle can be adjusted independently of the seat and locked in multiple positions. Combined with the Weight Tension Control, this allows for a dynamic or fixed seating position.

The Cobolt Commitment

  • Free UK Mainland Delivery: We manage all logistics to provide a transparent, all-inclusive price for your facility management budget.
  • Extra High Back: At 600mm high, the backrest provides full spinal support, crucial for reducing fatigue during long night shifts.
  • Heritage Reliability: Drawing on nearly 50 years of expertise to provide commercial-grade furniture solutions you can trust.

Features & Benefits

The Specification Choice for Critical Infrastructure

The 24-Hour Fabric Task Chair is primarily specified for roles where failure is not an option. It is the standard for 999/111 Operators and CCTV Monitoring Stations, where staff must remain alert and comfortable for 12-hour stints.

In Transport Logistics Offices, the adjustability allows a single chair to be perfectly tailored to three different drivers or dispatchers over a 24-hour period.

Key Technical Features

  • BS 5459-2:2008 Certified – 24/7 Safety.
  • 150kg Weight Capacity – Heavy duty.
  • Inflatable Lumbar Support – Custom fit.
  • Seat Slide Mechanism – Leg support.
  • Extra High Back (600mm) – Upper back relief.
  • Height Adjustable Arms – Shoulder support.
  • 5-Year Warranty – Long-term value.
Experience icon
50 Years of Excellence
Free delivery icon
Free UK Mainland Delivery
UK Design icon
UK Design

Cobolt Service & Trust: Professional Excellence

  • Free Delivery (UK Mainland): Our all-inclusive pricing model provides budget certainty for procurement teams.
  • Durable Fabric: Upholstered in hard-wearing commercial fabric available in Black or Blue to hide stains and wear.
  • Manufacturer Direct: We stock these high-performance units in the UK for immediate deployment.

Safety & Warranty

Built for Safety. Backed for Years.

  • This chair is rigorously tested to BS 5459-2000+A2:2008. This British Standard specifically covers performance requirements for office pedestal seating for use by persons weighing up to 150kg and for use up to 24 hours a day.
  • The Heavy Duty 5-Star Base provides a wide 670mm footprint, ensuring stability even when reclining fully with the tension control loose.
  • The High-Density Foam used in the seat and back is fire retardant to UK commercial standards and resists collapsing after years of heavy use.
  • The Reinforced Mechanism ensures that the seat slide and back rake adjustments remain secure and do not slip under load.
  • We offer a comprehensive 5-year manufacturer's warranty covering the mechanism and structural components.

Specification Dimensions

Usage
24/7
Capacity
150kg
Warranty
5 Years
Specification
Details
Purpose / Benefit
Overall Height
1050mm - 1180mm
Extra high back
Seat Dimensions
520mm (W) x 500mm (D)
Generous seating area
Seat Height
470mm - 600mm
Wide adjustment range
Back Dimensions
450mm (W) x 600mm (H)
Full spinal support
Arm Height
650mm - 850mm (from floor)
Fits various desks
Lumbar Support
Inflatable Pump
Personalised fit
Seat Depth
Adjustable (Seat Slide)
Leg length support
Compliance
BS 5459-2000+A2:2008
Certified 24H use
Max Capacity
150kg
Heavy duty
Warranty
5 Years
Investment protection

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5-7 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

Expert Advice: The Best Heavy-Duty 24-Hour Chair

Q: What is BS 5459 compliance?

A: BS 5459 is a tough British Standard that tests office chairs for structural safety and stability specifically for use by people weighing up to 150kg for 24 hours a day. It is a much higher standard than typical EN 1335 8-hour ratings.

Q: How does the lumbar pump work?

A: There is a small hand bulb (like on a blood pressure cuff) attached to the chair. Squeezing it inflates an air bladder in the lower backrest, increasing support. Pressing the release valve deflates it. This allows precise adjustment for each user.

Q: What is a seat slide?

A: The seat depth adjustment allows you to slide the seat cushion horizontally forward or backward. This ensures that users of different leg lengths can sit with their back against the chair while maintaining a healthy gap behind their knees.

Q: Is it suitable for 24/7 shift work?

A: Yes. This is its primary purpose. It is built to withstand constant use in 3-shift environments like control rooms, where a standard chair would wear out quickly.

Q: What is the maximum weight limit?

A: The chair is certified for users up to 150kg (approx. 23.5 stone), making it one of the most robust chairs in our range.

Q: Are the arms adjustable?

A: Yes. The chair features height-adjustable arms to support your shoulders. They can also be removed during assembly if an armless chair is preferred.

Q: Is assembly difficult?

A: No. It comes flat-packed but includes simple instructions. Because it is a heavy-duty chair, the components are heavier than standard, so two people may find assembly easier.

Q: Is delivery included?

A: Yes, Free UK Mainland Delivery is included. We dispatch via courier to ensure your heavy-duty seating arrives safely.

24-Hour Fabric Task Chair with Lumbar Pump & Seat Slide (150kg)

Product code: TCM15DM
Equip your critical operations with the Cobolt 24-Hour Ergonomic Fabric Task Chair. Engineered for Emergency Control Rooms, Call Centres, and 24/7 Sec...

Inc VAT

Exc VAT

£334.00

£278.33

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Trusted UK Supplier 50 years. Established. Reliable.

Free UK Mainland Delivery Clear. Upfront pricing.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: The "Shift-Worker" Specialist

The Cobolt 24-Hour Fabric Task Chair is the professional choice for environments that never sleep. Supplied with Free UK Mainland Delivery, this chair is built with reinforced mechanisms and high-density foam to withstand the rigours of constant use, backed by an impressive 5-Year Warranty.

Certified Heavy-Duty Performance

  • BS 5459 Compliant: This is the gold standard for 24-hour seating. It certifies that the chair has passed rigorous testing for heavy-duty use, ensuring it remains safe and stable even when used continuously day and night.
  • 150kg Weight Capacity: Built with a heavy-duty gas lift and reinforced base, this chair supports users up to 150kg (approx. 23 stone). This robust capacity makes it an inclusive solution for diverse workforces.
  • 5-Year Warranty: We are so confident in the durability of this chair that we offer a 5-year guarantee, significantly longer than the industry standard for 24-hour seating.

Advanced Customisation

  • Inflatable Lumbar Pump: Unlike fixed supports, this chair features a manual pump bulb. Users can inflate the lumbar zone to provide the exact level of pressure required to support their lower back, then deflate it for the next user.
  • Seat Depth Adjustment (Seat Slide): The seat pad can slide forward or backward. This allows taller users to get full thigh support while shorter users can reduce the depth to prevent circulation cutoff behind the knees.
  • Independent Back Rake: The back angle can be adjusted independently of the seat and locked in multiple positions. Combined with the Weight Tension Control, this allows for a dynamic or fixed seating position.

The Cobolt Commitment

  • Free UK Mainland Delivery: We manage all logistics to provide a transparent, all-inclusive price for your facility management budget.
  • Extra High Back: At 600mm high, the backrest provides full spinal support, crucial for reducing fatigue during long night shifts.
  • Heritage Reliability: Drawing on nearly 50 years of expertise to provide commercial-grade furniture solutions you can trust.

The Specification Choice for Critical Infrastructure

The 24-Hour Fabric Task Chair is primarily specified for roles where failure is not an option. It is the standard for 999/111 Operators and CCTV Monitoring Stations, where staff must remain alert and comfortable for 12-hour stints.

In Transport Logistics Offices, the adjustability allows a single chair to be perfectly tailored to three different drivers or dispatchers over a 24-hour period.

Key Technical Features

  • BS 5459-2:2008 Certified – 24/7 Safety.
  • 150kg Weight Capacity – Heavy duty.
  • Inflatable Lumbar Support – Custom fit.
  • Seat Slide Mechanism – Leg support.
  • Extra High Back (600mm) – Upper back relief.
  • Height Adjustable Arms – Shoulder support.
  • 5-Year Warranty – Long-term value.
Experience icon
50 Years of Excellence
Free delivery icon
Free UK Mainland Delivery
UK Design icon
UK Design

Cobolt Service & Trust: Professional Excellence

  • Free Delivery (UK Mainland): Our all-inclusive pricing model provides budget certainty for procurement teams.
  • Durable Fabric: Upholstered in hard-wearing commercial fabric available in Black or Blue to hide stains and wear.
  • Manufacturer Direct: We stock these high-performance units in the UK for immediate deployment.

Built for Safety. Backed for Years.

  • This chair is rigorously tested to BS 5459-2000+A2:2008. This British Standard specifically covers performance requirements for office pedestal seating for use by persons weighing up to 150kg and for use up to 24 hours a day.
  • The Heavy Duty 5-Star Base provides a wide 670mm footprint, ensuring stability even when reclining fully with the tension control loose.
  • The High-Density Foam used in the seat and back is fire retardant to UK commercial standards and resists collapsing after years of heavy use.
  • The Reinforced Mechanism ensures that the seat slide and back rake adjustments remain secure and do not slip under load.
  • We offer a comprehensive 5-year manufacturer's warranty covering the mechanism and structural components.
Usage
24/7
Capacity
150kg
Warranty
5 Years
Specification
Details
Purpose / Benefit
Overall Height
1050mm - 1180mm
Extra high back
Seat Dimensions
520mm (W) x 500mm (D)
Generous seating area
Seat Height
470mm - 600mm
Wide adjustment range
Back Dimensions
450mm (W) x 600mm (H)
Full spinal support
Arm Height
650mm - 850mm (from floor)
Fits various desks
Lumbar Support
Inflatable Pump
Personalised fit
Seat Depth
Adjustable (Seat Slide)
Leg length support
Compliance
BS 5459-2000+A2:2008
Certified 24H use
Max Capacity
150kg
Heavy duty
Warranty
5 Years
Investment protection

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5-7 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Expert Advice: The Best Heavy-Duty 24-Hour Chair

Q: What is BS 5459 compliance?

A: BS 5459 is a tough British Standard that tests office chairs for structural safety and stability specifically for use by people weighing up to 150kg for 24 hours a day. It is a much higher standard than typical EN 1335 8-hour ratings.

Q: How does the lumbar pump work?

A: There is a small hand bulb (like on a blood pressure cuff) attached to the chair. Squeezing it inflates an air bladder in the lower backrest, increasing support. Pressing the release valve deflates it. This allows precise adjustment for each user.

Q: What is a seat slide?

A: The seat depth adjustment allows you to slide the seat cushion horizontally forward or backward. This ensures that users of different leg lengths can sit with their back against the chair while maintaining a healthy gap behind their knees.

Q: Is it suitable for 24/7 shift work?

A: Yes. This is its primary purpose. It is built to withstand constant use in 3-shift environments like control rooms, where a standard chair would wear out quickly.

Q: What is the maximum weight limit?

A: The chair is certified for users up to 150kg (approx. 23.5 stone), making it one of the most robust chairs in our range.

Q: Are the arms adjustable?

A: Yes. The chair features height-adjustable arms to support your shoulders. They can also be removed during assembly if an armless chair is preferred.

Q: Is assembly difficult?

A: No. It comes flat-packed but includes simple instructions. Because it is a heavy-duty chair, the components are heavier than standard, so two people may find assembly easier.

Q: Is delivery included?

A: Yes, Free UK Mainland Delivery is included. We dispatch via courier to ensure your heavy-duty seating arrives safely.

Overview

Product Overview: The "Shift-Worker" Specialist

The Cobolt 24-Hour Fabric Task Chair is the professional choice for environments that never sleep. Supplied with Free UK Mainland Delivery, this chair is built with reinforced mechanisms and high-density foam to withstand the rigours of constant use, backed by an impressive 5-Year Warranty.

Certified Heavy-Duty Performance

  • BS 5459 Compliant: This is the gold standard for 24-hour seating. It certifies that the chair has passed rigorous testing for heavy-duty use, ensuring it remains safe and stable even when used continuously day and night.
  • 150kg Weight Capacity: Built with a heavy-duty gas lift and reinforced base, this chair supports users up to 150kg (approx. 23 stone). This robust capacity makes it an inclusive solution for diverse workforces.
  • 5-Year Warranty: We are so confident in the durability of this chair that we offer a 5-year guarantee, significantly longer than the industry standard for 24-hour seating.

Advanced Customisation

  • Inflatable Lumbar Pump: Unlike fixed supports, this chair features a manual pump bulb. Users can inflate the lumbar zone to provide the exact level of pressure required to support their lower back, then deflate it for the next user.
  • Seat Depth Adjustment (Seat Slide): The seat pad can slide forward or backward. This allows taller users to get full thigh support while shorter users can reduce the depth to prevent circulation cutoff behind the knees.
  • Independent Back Rake: The back angle can be adjusted independently of the seat and locked in multiple positions. Combined with the Weight Tension Control, this allows for a dynamic or fixed seating position.

The Cobolt Commitment

  • Free UK Mainland Delivery: We manage all logistics to provide a transparent, all-inclusive price for your facility management budget.
  • Extra High Back: At 600mm high, the backrest provides full spinal support, crucial for reducing fatigue during long night shifts.
  • Heritage Reliability: Drawing on nearly 50 years of expertise to provide commercial-grade furniture solutions you can trust.

Features & Benefits

The Specification Choice for Critical Infrastructure

The 24-Hour Fabric Task Chair is primarily specified for roles where failure is not an option. It is the standard for 999/111 Operators and CCTV Monitoring Stations, where staff must remain alert and comfortable for 12-hour stints.

In Transport Logistics Offices, the adjustability allows a single chair to be perfectly tailored to three different drivers or dispatchers over a 24-hour period.

Key Technical Features

  • BS 5459-2:2008 Certified – 24/7 Safety.
  • 150kg Weight Capacity – Heavy duty.
  • Inflatable Lumbar Support – Custom fit.
  • Seat Slide Mechanism – Leg support.
  • Extra High Back (600mm) – Upper back relief.
  • Height Adjustable Arms – Shoulder support.
  • 5-Year Warranty – Long-term value.
Experience icon
50 Years of Excellence
Free delivery icon
Free UK Mainland Delivery
UK Design icon
UK Design

Cobolt Service & Trust: Professional Excellence

  • Free Delivery (UK Mainland): Our all-inclusive pricing model provides budget certainty for procurement teams.
  • Durable Fabric: Upholstered in hard-wearing commercial fabric available in Black or Blue to hide stains and wear.
  • Manufacturer Direct: We stock these high-performance units in the UK for immediate deployment.

Safety & Warranty

Built for Safety. Backed for Years.

  • This chair is rigorously tested to BS 5459-2000+A2:2008. This British Standard specifically covers performance requirements for office pedestal seating for use by persons weighing up to 150kg and for use up to 24 hours a day.
  • The Heavy Duty 5-Star Base provides a wide 670mm footprint, ensuring stability even when reclining fully with the tension control loose.
  • The High-Density Foam used in the seat and back is fire retardant to UK commercial standards and resists collapsing after years of heavy use.
  • The Reinforced Mechanism ensures that the seat slide and back rake adjustments remain secure and do not slip under load.
  • We offer a comprehensive 5-year manufacturer's warranty covering the mechanism and structural components.

Specification Dimensions

Usage
24/7
Capacity
150kg
Warranty
5 Years
Specification
Details
Purpose / Benefit
Overall Height
1050mm - 1180mm
Extra high back
Seat Dimensions
520mm (W) x 500mm (D)
Generous seating area
Seat Height
470mm - 600mm
Wide adjustment range
Back Dimensions
450mm (W) x 600mm (H)
Full spinal support
Arm Height
650mm - 850mm (from floor)
Fits various desks
Lumbar Support
Inflatable Pump
Personalised fit
Seat Depth
Adjustable (Seat Slide)
Leg length support
Compliance
BS 5459-2000+A2:2008
Certified 24H use
Max Capacity
150kg
Heavy duty
Warranty
5 Years
Investment protection

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5-7 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

Expert Advice: The Best Heavy-Duty 24-Hour Chair

Q: What is BS 5459 compliance?

A: BS 5459 is a tough British Standard that tests office chairs for structural safety and stability specifically for use by people weighing up to 150kg for 24 hours a day. It is a much higher standard than typical EN 1335 8-hour ratings.

Q: How does the lumbar pump work?

A: There is a small hand bulb (like on a blood pressure cuff) attached to the chair. Squeezing it inflates an air bladder in the lower backrest, increasing support. Pressing the release valve deflates it. This allows precise adjustment for each user.

Q: What is a seat slide?

A: The seat depth adjustment allows you to slide the seat cushion horizontally forward or backward. This ensures that users of different leg lengths can sit with their back against the chair while maintaining a healthy gap behind their knees.

Q: Is it suitable for 24/7 shift work?

A: Yes. This is its primary purpose. It is built to withstand constant use in 3-shift environments like control rooms, where a standard chair would wear out quickly.

Q: What is the maximum weight limit?

A: The chair is certified for users up to 150kg (approx. 23.5 stone), making it one of the most robust chairs in our range.

Q: Are the arms adjustable?

A: Yes. The chair features height-adjustable arms to support your shoulders. They can also be removed during assembly if an armless chair is preferred.

Q: Is assembly difficult?

A: No. It comes flat-packed but includes simple instructions. Because it is a heavy-duty chair, the components are heavier than standard, so two people may find assembly easier.

Q: Is delivery included?

A: Yes, Free UK Mainland Delivery is included. We dispatch via courier to ensure your heavy-duty seating arrives safely.

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