Xenium DuoBack

The home of the renowned and highly regarded  DuoBack® back rest.

The vertically split back rest reduces direct pressure on the spine by up to 50%. Your back is instead supported on your back muscles either side of the spine.

Each back pad is individually mounted on a flexible yet robust bracket.  These flex and move with you throughout your working day to ensure that your back is fully supported, regardless of how you sit.

Dynamic seating at its best.

Gas assisted seat height adjustment.  Tested and certified to TUV and German DIN standards

The vertical split of DuoBack reduces direct pressure on the spine by up to 50%.  Instead, the back is supported on the muscles either side of the spine.

Multi-lock synchronous mechanism with weight tension adjustment.

Choose no armrests, 2D height adjustable armrests or 3D height, width and depth adjustable arm rests.

470mm high DuoBack split back rest in a twin tone fabric / mesh finish.

Independently mounted back rest pads provide continually adjusting back support which adapts  to changes in your posture.

Available in a Grey, Black or White frame finish.


Black or White with polished aluminium features. 

Seat depth adjustment means you can optimise support based on your upper leg length. 

735mmØ 5-star base in black, white or polished aluminium.

65mmØ twin wheeled brake unloaded castors for soft floors OR soft wheeled castors for hard floor surfaces.

Xenium DuoBack®

integrated forward seat tilt of +4°

Design Assured

All of our seating is designed and built to the highest German DIN standards.  This means every component, nut, bolt and fixing is selected for its suitability of purpose.  Each new design is tested to destruction to ensure that our chairs are suitable to withstand today's demanding office environments.  They also follow and conform to German TÜV standards for ergonomic seating requirements.  Often going above and beyond the set guidelines.

GS mark TÜV 150 kg

GS mark TÜV 180 kg (Must be stipulated at point of order)

EN 1335 1 – 3

NPR 1813 (Applies to all chair versions with the uprated gas spring GL 40.55)

TUEV_GS (2).jpg

At Home

Whilst it is true that all of our seating is primarily designed for use in a busy modern office, the current climate means many more of us are working from home.  To us, now has never been a better time to stress the importance of ergonomics, especially in the 'office at home'.  Many companies take workplace ergonomics very seriously as they look after their staffs' well being.  So the chances are you have a decent office chair, at the office.

But what about at home?  We hope that you will consider how and what you sit on away from the office and that you don't just make do!

If you are looking to purchase a quality chair for home, look out for any of our fabric, vinyl or leather finishes marked with the following symbols...

These markings indicate that the finishes have been tested to meet European and British standards in regards to fire and flame resistance and we hope, offer extra peace of mind when used at home.

Xenium DuoBack measurements:

Seat Height:

Back Width:

420mm - 530mm


Seat Width:

Seat - Lumbar:


150mm - 250mm

Seat Depth:

Seat - Elbow:

390mm - 500mm

150mm - 250mm

Back Height:

Elbow - Elbow:

540mm - 630mm

360mm - 510mm

User Weight:

User Height:

45kgs - 110kgs

5'4" - 6'4"

Xenium DuoBack standard adjustments:

Seat height adjustment

Multi-lock synchronous mechanism with weight tension control

Independently height adjustable back rest

Sliding seat mechanism

Forward seat tilt of +4°

A clever design feature of all Xilium and Xenium operator chairs is that when the back rest is raised in height, it also travels backwards.  This means that if you are tall more of the seat is exposed for a longer upper leg.  Combined with the depth adjustment of the seat Xilium and Xenium chairs can easily and comfortably accommodate the taller user.  In contrast, by lowering the back rest and reducing the seat slide, it will also adjust to more petit individuals.  This is a perfect ergonomic workplace solution for multiple users of various sizes. 


Each DuoBack® pad is independently mounted on a firm yet flexible bracket.

They are designed to flex and move as you do, continually adjusting to changes in your posture...

... They will 'hug' your back when you are seated and 

each pad will adjust itself to the unique shape of

your back...

... The vertical gap between the DuoBack® pads reduces direct pressure on the spine by up to 50%.  Recommended worldwide by physiotherapists, medical professionals and work place assessors for the support and ergonomic excellence DuoBack® provides.

Dynamic Ergonomics

Xenium DuoBack options:


A60: 2D Armrests

Height adjustable arm rests.  Slight rotation of the front of the arm.

Finished in grey, black or...

... white with black tops.

A64: 3D Armrests

Height, width and depth adjustable arm rests.

Finished with black frames and grey or black tops...

... Polished aluminium frames and grey or black tops...

... or polished aluminium frames, white with black tops.

'3D' Armrests adjust in width

underneath the seat and also by rotating the offset PU top pads by 180° to bring them closer together.

Further width adjustment and fine tuning the support for your arms is achieved by rotating the arm top pads to the desired position. 

Neck Rest:

As an integral part of the aesthetic design of Xenium Classic, the headrest is finished in grey mesh to compliment the mesh upholstery on the back rest and seat edges.


The standard colour for the mesh upholstery is grey.  However, you may choose a different colour from our 'Runner' fabric range.  If you would prefer the neck rest upholstery to be the same as the main colour of the chair, you can have this too.


Chairs finished in leather, have the option of a leather neck rest.  

Additional Comfort:

Coccyx Relief Zone:

Hidden from view, our coccyx relief zone is a void at the rear of

the seat cushion which is designed to relieve pressure on the coccyx.

Memory Foam:

Pressure relieving memory foam for the seat.

Soft Castors:

Often overlooked but actually very important!

Soft wheeled castors for hard surfaces such as wooden or

tiled floors.

Design Features: Make It Yours

Frame Finish:

Xenium's default colour finish for the frame is grey.  However, there is a black edition and a popular, growing demand for white, you can choose this too!  Certain components, such as arm rest tops will still remain black, so as to keep your chair looking clean and fresh.

Standard Finish:

Grey mesh 'Runner' fabric.

Grey frame

Black base

Grey armrests

(where applicable)

Black armrests

(where applicable)

Black frame

Black Edition Finish:

Black mesh 'Runner' fabric on the seat edges and back rest.

White Edition Finish:

White armrests.

Black tops.

Polished lower frame

White upper frame

White shell

Polished 5 star base

Go Colour:

You can get creative and choose the colour of your mesh panels, or runners as we call them.  Choose from any colour in the RUNNER 3D fabric range.


Available in the following finishes.  Click a swatch or fabric name to see the available colours within that range, the fabric durability and the fire retardant information.


We can upholster chairs in a corporate or customer fabric / leather.  Please contact us to discuss your requirements. 

Fabric Price Group 20



100% Polyester



100% Polyurethane Vinyl



100% Polyester



100% Polyester



100% Re-Cycled Polyester



100% Polyester



100% Polyester



100% Re-Cycled Polyester

Fabric Price Group 40



100% Re-Cycled Polyester



100% Polyester FR



100% Urethane Medical Vinyl

Fabric Price Group 45



100% Trevira CS



100% Pigmented Split Leather



100% Urethane Vinyl



80% Polyester

20% Re-Cycled Polyester

Fabric Price Group 48



100% Virgin Wool



95% NZ Wool / 5% Polyamide



95% Virgin Wool / 5% Polyamide

Leather Price Group 50



Pigmented soft grain leather



100% Semi-Aniline Leather

Leather Price Group 55

Gallery Xenium DuoBack 
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Runner Fabric
White Edition
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Runner Fabric
White Edition
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Runner Fabric
White Edition
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Runner Fabric
White Edition
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Runner Fabric
White Edition
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Edition
Polished Base / Frame
Black Leather
Xenium DuoBack
Xenium DuoBack chair with...

A64 Armrests
Black Edition
Polished Base / Frame
Black Leather
Xenium A64 Armrest
A64 Armrest
Xenium A60 Armrest
A60 Armrest
Show More
Alternative Xenium Chairs 
Office Ergonomics Limited
4 Ministry Wharf
HP14 4HW
Tel: 01494 565995

© 2020 by Office Ergonomics Limited

TUEV_GS (2).jpg
logo_quality_office (2).jpg