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Postura+ One Piece Chair
Postura+ One Piece Chair
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The UK’s first choice for education seating: Our Postura+ One Piece Chair is trusted by schools across the UK for its unbeatable durability, comfort, and value.
Designed to promote good posture and provide exceptional comfort.
Developed to support good posture, this industry leading classroom chair keeps students comfortable throughout the school day. Educators appreciate its high-impact polypropylene and gas-injected legs for outstanding strength and longevity. Leading the way in customisation options, the One Piece Chair is available in 20 standard colours, and is lightweight, stain-resistant, antistatic and easy to clean.
Ergonomic comfort
- Waterfall seat edge for vastly improved comfort.
- Curved backrest for better lumbar support and flexibility.
- Built-in window providing better ventilation.
Industry leading strength
- High-impact resistant polypropylene.
- Gas injected legs add strength.
- Supports weight of up to 204kg (Size 5 & 6).
Easy maintenance
- Stain resistant and easy to clean.
- One piece injection mould with no loose parts or gaps.
- UV filter for occasional outdoor use.
Classroom safe
- Anti-static and anti-rocking for student safety.
- BS EN 1729 certified.
- BS EN 16139 certified.
Easy storage
- Weighs 1.43-3.73kg with an integrated handle for easy lifting.
- Stackable up to 12 high with optional trolly for manoeuvrability.
Customisable
- Industry leading 20 standard colour options.
- 6 chair sizes available catering for ages 3-18+.
- Seat Heights – 260, 310, 350, 380, 430 & 460mm.
- Optional upholstered seat pad.
- Option to link chairs (size 5 & 6 only).
Additional Information
- Materials Information:
- Jet Black one piece chairs: 100% recycled polypropylene
- All other one piece chairs: 50% recycled polypropylene
- User Weight Loading:
- Size 1: 130kg
- Size 2 & 3: 160kg
- Size 4, 5 & 6: 200kg
- Size 1: 130kg
- Care & Maintenance Instructions:
- Maintaining the appearance and finish of your product is best achieved through proper care and cautious use.
- For regular cleaning of Shells use a soft cloth with mild soap or detergent and lukewarm water. Avoid solvents, citrus/orange-based cleaners or heavy-duty kitchen cleaners.
- Stubborn spots like chewing gum can be removed using cigarette lighter fluid. Wipe dry immediately.
- To restore lustre to smooth surfaces and perform light cleaning, a general non-abrasive all-purpose cleaner is recommended. Its anti-static properties help repel dust and dirt. High quality wax can be used to restore lustre and provide protective coating.
Postura Sizing Guide
On Postura+ chairs you can find a colour-coded sticker on the top side of the backrest that corresponds to the table above. The example (below left) shows a blue sticker, so the chair can be identified as a Ash Grey size mark 6 chair


The Perfect Fit Explained
In January 2007, British and European Standards were established for educational institutions.’ BS EN 1729 Part 1 ensures that furniture meets appropriate size, shape, and ergonomic design to promote good posture and reduce RSI and back pain in students. This guide includes size marks for fixed seat and table heights suitable for students of different ages.
The correct seat height is determined by measuring the popliteal height, which is the distance from the floor to the back of the knee when seated with thighs horizontal and lower leg vertical with feet flat on the floor. This measurement is useful in determining the compatible size for existing or older furniture that does not comply with BS EN 1729. Stature is measured from the floor to the top of the head.
It’s crucial that table size marks align with chair and stool size marks. EN chairs should ideally match EN tables, ensuring a harmonious and ergonomic environment for students.

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