Sealy PostureTech Oxwich Single Mattress
The Sealy PostureTech Oxwich Mattress pairs twice-tempered PostureTech springs with a thin polyester fibre layer, which means you get firm, responsive support with only a light cushion on top.
- Extra-firm feel for back sleepers
- Responsive support at pressure points
- Reinforced edges against roll-off
£299
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Sealy PostureTech Oxwich Mattress
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Mattress details
Mattress
Sealy PostureTech Oxwich Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
24
Layers
2
Layer Details
Polyester fibre layer
Super soft polyester fibres sit over the spring unit under a traditionally tufted damask cover. They add a light cushion to your movement, though the surface still feels firm.
PostureTech Core Support spring unit
Twice-tempered PostureTech springs form the foundation and give maximum support to pressure points, with EdgeGuard tucked inside. You get firm, responsive support and a reinforced edge against roll-off.
Layer details from crushedvelvetbedstore.co.uk product page, November 2026.
Key benefits
- Fits tight floor plans: At 3ft x 6ft 3in, the UK single works in rooms from our suggested 2.1m x 2.8m, so a sloping loft ceiling or a study desk can share the space.
- Steadier edges on a narrow bed: EdgeGuard sits inside the spring unit, which means the side of a 90cm-wide bed feels more secure when you sleep close to it or sit on it.
- Two separate beds for guests: A pair of UK singles in a spare room gives visitors who don't share a bed their own firm surface, each one supported independently.
- Easier to turn in a small room: The Oxwich is double-sided, and turning a UK single regularly is a smaller job in a cramped bedroom than wrestling with a UK king.
- Flat support for one sleeper: Twice-tempered springs under a light fibre layer keep you on top of the mattress, which suits a solo back or front sleeper who dislikes sinking in.
This size suits you if...
You sleep alone on your back or front and want a firm, flat surface, your bedroom is short on floor space, or you're setting up a guest room with two separate beds for visitors who won't share.
Consider another size if...
You share the bed, or you need room to spread out as a single adult. We'd recommend the UK double instead: the UK single is 45cm narrower than it, and we suggest at least 2.6m x 2.8m for the UK double.
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FAQ's
Will the Sealy Oxwich UK single fit a bunk bed or mid sleeper?
The Oxwich is 24cm deep. Raised frames such as bunks, cabin beds and mid sleepers usually state a maximum mattress depth so the guard rail stays high enough above the sleeper. Check the frame maker's guidance against that 24cm before buying.
Is the Sealy Oxwich single too firm for a child?
It may be. The Oxwich is rated extra firm with only a thin polyester fibre layer over the springs, and lighter sleepers can find that too hard. A teenager who sleeps on their back or front is a closer match than a small child who curls up on their side.
Is a UK single Oxwich long enough for a tall teenager?
The UK single is 190cm long (6ft 3in), the same length as the UK double. If length is the problem, the UK king is 10cm longer than the UK single, but it is also 60cm wider, and we suggest at least 2.7m x 2.9m of floor space for it.
What size room do I need for a Sealy Oxwich UK single?
We suggest at least 2.1m x 2.8m for a UK single, which leaves space to walk past the bed and open a wardrobe. If siblings are sharing a room with two UK singles and a walkway between them, measure the full width before you commit.
Should one adult choose the Oxwich in a UK single or a UK double?
A UK single suits an adult who sleeps fairly still and wants to keep floor space free. If you turn a lot or sprawl, the UK double gives you more room: the UK single is 45cm narrower than it, and we suggest at least 2.6m x 2.8m for the UK double.