Silentnight Breathe Gel Memory Foam Single Mattress
The Silentnight Breathe Gel Memory Foam Mattress is a medium firm, all-foam mattress at 18cm deep, which makes it a little shallower than the deep hybrid styles you may have seen elsewhere, but simpler to move and fine on most bed bases.
- Cool gel foam for warm sleepers
- Eases pressure at hips & shoulders
- Edge-to-edge support, no roll-together
£249
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Silentnight Breathe Gel Memory Foam Mattress
More available sizes
Mattress details
Mattress
Silentnight Breathe Gel Memory Foam Mattress
Size
Firmness
Medium Firm
Construction
Foam
Rolled
Memory Foam
Gel
Depth (cm)
18
Layers
3
Layer Details
Soft Touch Quilted Cover
A quilted fabric finish that gives a smooth, breathable sleep surface. It's the first thing you'll feel, and it's designed for comfort rather than a taut, flat top.
Cool Gel Memory Foam
This layer enhances pressure relief and support, which means less strain on hips and shoulders as you settle in. It also regulates body temperature better than standard memory foam, a genuine help if you tend to sleep warm.
Supportive Miratex® Foam
Miratex foam conforms to the shape of your body as you sleep, giving maximum comfort. It provides edge to edge support with no roll together, so you get the full sleeping surface rather than drifting towards the middle.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Slim enough for raised frames: At 18cm deep, it sits low enough for most bunk beds, cabin beds and mid sleepers, where a taller mattress would leave the safety rail uselessly short.
- Fits the smallest rooms: At 90cm wide, this size leaves room for a desk, wardrobe or toy storage in a compact child's bedroom, or two beds plus a walkway if siblings share.
- Cool gel for warm sleepers: The cool gel memory foam regulates body temperature better than standard memory foam, which matters for teenagers who run hot under a duvet.
- Edge to edge support on a narrow bed: Miratex foam supports right to the sides, so all 90cm of width is usable rather than feeling like you might roll off the edge.
- Light to handle: An all-foam single is far easier to carry up a loft ladder or manoeuvre onto a top bunk than a sprung mattress in a bigger size.
This size suits you if...
You're buying for a child or teenager moving up to a full-size bed, you need a mattress for a bunk, cabin or mid sleeper where the 18cm depth keeps the safety rail effective, or you're furnishing a spare room that doubles as an office and floor space is tight. It also suits a student room or first flat where the frame came with the tenancy.
Consider another size if...
You're an adult who shares the bed, or a restless solo sleeper who wants more room to spread out. We'd recommend the UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m for it.
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FAQ's
Will the Silentnight Breathe Gel fit a bunk bed in the UK single size?
Yes, in most cases. The UK single is the standard bunk bed size at 90 x 190cm, and at 18cm deep this mattress is slim enough to keep the top bunk's safety rail at a useful height. Check your frame's maximum mattress depth before buying, as some bunks specify a limit.
Is the UK single Silentnight Breathe Gel suitable for a child?
Yes, it's a natural fit for a child moving up from a cot bed or a teenager outgrowing a smaller frame. The medium firm feel gives growing backs proper support, the cover is hypoallergenic, and the cool gel layer helps children who tend to overheat at night.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves enough clearance to walk around the bed and open drawers or wardrobe doors. In a box room or loft conversion with a sloping ceiling, the 90cm width is often the only size that fits comfortably.
Is a UK single big enough for an adult?
For one adult, yes, though it's snug. At 90cm wide you get the full width to yourself thanks to the edge to edge support, and at 190cm long it suits most heights. If you're tall or like to sprawl, the UK king is 60cm wider and 10cm longer; allow at least 2.7m x 2.9m for it.
Where can I buy the Silentnight Breathe Gel in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you commit, as offers on entry-level foam mattresses move around fairly often.