XXXL Office Chair KOS 506 with neckrests.

CH KOS830 24 7


This office chair for the larger user is designed with optimal support in mind.

A large office chair for the bigger person with adjustable lumbar support to improve comfort.

Commes with Adjustable Armrests to offer you the complete fit.

Fabric Frame - Black


€2,966.76incl VAT

Prices quoted are ex VAT

KOS XXXL Adjustable Lumbar SupportThese heavy duty office chairs have extra strength with reinforced synchronous mechanism with sliding bearings and anti shock system.

The chair is designed in a way that they help to support optimally the body in every seating position.

You can individual adjust the backrest and the back pressure to the size and weight of the user.

Height- adjustable (70 mm) and inclinable headrest  to relieve the neck and shoulder muscles during a relaxed seating position.

Depth and height adjustable (100 mm) lumbar support with fine adjustable air-pressure technology.

Suitable for people up to 200kg.


Suitable for individuals


up to 200kg


between 5' - 6' 2"


Backrest Height: 780mm.

Seat Height: 420-480mm.

Seat:  W560 x D490mm.


Base: Aluminium black


Castors: Hard castors, load- dependent braked, for soft floors (acc. to DIN EN 12529).


Adjustable Head Support.


Adjustable Armrests with Leather Cover: Width, height and depth adjustable


Synchronous Mechanism


Weight Adjustment

Sprung Column

Adjustable Lumbar Support

This chair complies with al EN 1335 standards.



In stock, goods will be dispatched from our ware house within 2-3 business days.


Box delivery with our courier.


Our experienced chair consultant will be in touch with you to ensure your chair is set up to suit your individual needs.


Returns policy.


In the event of receiving this chair damaged on delivery please let us know within 24 hours of receipt so that you can make a valid claim.


If you change you mind on purchase, please notify us within 14 day of purchase should you wish to return items.  You will need to ring for a Returns Note Number, which you will need to quote when returning items. Goods must be unused, unopened, in a salable condition and in their original packaging. 


If the item has been sent in error or is defective KOS will arrange collection and return.  Otherwise the onus is on the customer to arrange and pay for the return of the items.


Refunds will be issued on receipt of returned goods in salable condition.

Really comfy!
Joshua B. on 28/04/2017 So comfortable. I find it hard to find a chair for the large individual
Annette Shannahan - Owner ..

We at Abbey Physio and HealthcareDirect have worked very effectively and on many occasions with Seamus and the team at Kos Ergonomics when seeking solutions and resolving work-related...

Eileen Murphy - Physiotherapist ..

I recommend patients to KOS. They have experience and expertise with ergonomic solutions for patients with particular problems. When they sell a chair, they ensure that the chair is fitted...

Padraic O'Fiynn - Ergonomist ..

Since 2006, working as a chartered ergonomist with KOS Ergonomic solutions has greatly contributed to an early and safe return to work mainly for staff and where necessary students of the...

Kathleen Treanor - Ergonomist ..

I Kathleen Treanor have worked collaboratively with KOS and Seamus Kennedy since 2000. We have worked together with many organisations both public and private, to provide professional...

Sarah Carry - UCD ..

Since first contacting KOS Ergonomic Solutions in 2010, l have found their service reliable and efficient, combining excellent customer service and product expertise with a range of ergonomic...

Eileen Hannon - Stryker ..

KOS Ergonomic Solutions has supplied us with chairs for our Beading Room which have been very beneficial to the safety and comfort of our employees working in this area. These chairs are used 14-18...

Alison Minter - Paypal ..

Just wanted to say thank you for the quick and efficient service over the last year. It’s been a pleasure dealing with you and I would highly recommend KOS to anyone

Irene O'B - Physio & Ergonomist ..

Following a fall from a bicycle I sustained a T10 (mid back) wedge fracture with no nerve damage. I also reinjured my neck having sustained a whiplash injury some 20 years previously. Three months...

Karol Fitzgerald - Athlone IT ..

As I informed you previously to my numerous back problems, resulting from fracturing a couple of vertebra in my lower back a number of years ago. This later caused disc to slip, trapping nerves...


KOS Ergonomics Ireland

Since 1991, we have been working with companies and individuals as the leading provider of ergonomic office furniture in Ireland.

We currently provide a full ergonomic service from office to home with our ergonomic homeworker packages, sit stand desks , ergonomic chairs , remote assessments and KOS Ergonomic program management software.

Discover our wide range by booking a showroom consultation or by shopping online!

Visit Our Showroom

We can provide you with a VDU Assessments when you visit our showrooms in Dublin or in Holycross in Tipperary.

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