Sitesse S300 Posture Chair with B300 Backrest & S300 Seat

This distinctive range of posture seating is approved by Occupational Therapists, Physiotherapists and Chiropractors. Sitesse is fully customisable and offers a host of ergonomic features. Backrests are upholstered both sides and curved to your body shape, while the sliding seats are double curved with a 'waterfall' design front for extra comfort. Sitesse has been designed so you can easily mix and match the chair components to create your perfect fit. Due to it being tailor-made with your choice of colour this chair is non-returnable.

Product Features.

Sitesse orthopaedic posture office chair
Body weight tension adjustment to be in equilibrium with your own bodyweight
Sitesse sliding seat
Seat depth adjustment (sliding seat) to optimise comfort and reduce pressure on your legs
Sitesse height adjustable backrest
Height adjustable backrest includes easy to use ratchet system with 5 height positions
Sitesse orthopaedic posture office chair armrests
Independent seat and backrest angle adjustment to set the start point of the synchro mechanism
Sitesse orthopaedic posture office chair headrest
Upholstered neck support (headrest) option with height and tilt adjustment
Sitesse thoracic support
Inflatable thoracic support option increases the contact area of the upper spine by filling the space between the shoulder blades helping to prevent slouching
Sitesse lumbar support
Inflatable lumbar support option increases the contact area of the lower back supporting the natural curvature of the spine
Sitesse memory foam seat
Seat air technology option provides adjustment for seat firmness and dynamic lateral movement to help increase core stability

Product Specifications

  • Backrest

    W44cm x H57-65cm

  • Seat

    W53cm x D47-52cm (sliding seat)

  • Seat height


  • Mechanism

    Dynamic synchronised mechanism

  • Frame


  • Base

    Black Nylon, Polished Aluminium

  • Castors

    Hard floor, Soft floor

  • Armrests (optional)

    2D, 3D, Multi functional

  • Headrest (optional)


  • Warranty

    5 years

We charge a one-off fee of £15+VAT for all orders regardless of quantity, except sit/stand desks which have a one-off £70+VAT fee per order due to the size and weight. Our standard delivery covers the UK mainland (including Isle of Wight) only.

We aim to deliver your order within 5-7 days. Once you have placed your order we will contact you within 24 hours to confirm your delivery date. If your items are needed in a real hurry please get in touch and we may be able to speed things up for you.

Chairs are normally delivered within 4-5 weeks. Due to them being tailor-made, in a colour of your choice, chairs are non-refundable (unless faulty).

To ensure your desk arrives with you in perfect condition and doesn’t get damaged in transit we deliver them on a wooden pallet which you get to keep for free! Woop! You can turn it into all kinds of handy things for the home or office.  If this puts you off please contact our team as we may be able to arrange collection.


Series 300 Posture Chair



£520.80 (Ex VAT



Neck Support (1)

Choose your option

Armrests options (3)

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Thoracic Support (1)

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Lumbar Support (1)

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Seat Air Technology (1)

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Seat Memory Foam (1)

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Coccyx Cut-Out (1)

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Base Options (2)

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Castor Options (2)

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