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Onyx combines a tall, ergonomic back with height-adjustable arms for personalised support at your desk. Self-assembly friendly and adaptable to Ergonomic Chairs and Executive Chairs environments, it’s a dependable choice for teams and individuals alike. Contact us for details and to discuss space fit.
The Onyx High Back Ergonomic Posture Chair with Height Adjustable Arms is a purpose-built solution for busy workplaces that prioritise comfort and productivity. Its tall back and supportive cushions are designed to promote proper posture during long periods at the desk, making it well suited to managers, teams, and individual workstations in modern spaces. The result is reduced fatigue and a more focused workday, whether you’re drafting reports, collaborating with colleagues, or analysing data.
A key benefit is precise adjustability. The chair features height-adjustable arms to fit your desk height and working position, with the added option that the arms can be removed if you prefer a sleeker profile. It’s designed for straightforward self-assembly, helping you get up and running quickly in Ergonomic Chairs settings and other work environments.
Beyond comfort, the Onyx is built to endure daily use while remaining visually versatile alongside our broader seating range. Its high back and substantial back width provide generous upper-body support, making it suitable for flexible spaces such as reception areas, meeting rooms, or private offices. For broader seating options, explore related ranges in Executive Chairs and Fabric Chairs, or dip into our Seating collection for additional solutions. Our team can also discuss Bespoke Bespoke Products if you’re planning a customised setup.
Warranty options and aftercare are available to ensure long-term performance. For personalised advice, dimensions, or to confirm fit for your space, contact us for assistance or more information.
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| Back Colour | Black, Black, Matching Bespoke Colour, Matching Bespoke Colour |
| Headrest | None, None, With Headrest, With Headrest |
| BackWidth | 430 |
| Colour | Bespoke Bergamot Cherry, Bespoke Ginseng Chilli, Bespoke Maringa Teal, Bespoke Myrrh Green, Bespoke Quest Crab, Bespoke Quest Kelp, Bespoke Quest Limpet, Bespoke Quest Mussel, Bespoke Quest Salt, Bes |
| BackType | 495-570 |
| SeatHeight | High |
| SeatDepth | 460-510 |
| SeatWidth | 440 |
| ProductWeight | 22.00; 23.00 |
| Height | 1020-1140; 1180-1430 |
| Depth | 670 |
| Width | 650 |
| FAFWarranty | 2 Years |
| MCWarranty | 5 Years |
| ArmsRemovable | TRUE |
| RecommendedUsage | 24 |
| WeightCapacity | 135 |
| ArmType | Height Adjustable |
| SelfAssembly | Yes |
| FrameMaterial | Chrome Metal |
| SeatMaterial | Fabric; Soft Bonded Leather |
| BackMaterial | Fabric; Soft Bonded Leather |
| ISPCCode | 60241 |
| BackHeight | 530-580; 690-840 |
| TestCertificates | BS 5459. Back Fabric: BS 5852 Ignition Source 5 (Crib 5); EN 1021-1; EN 1021-2. Bespoke Seat Fabric: BS 7176 Low Hazard; EN 1021-1; EN 1021-2.; BS 5459; BS 5852 Ignition Source 5 (Crib 5); EN 1021-1; |
| ArmsWidth | 450 |
| ArmsHeight | 635-735 |
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