Last seen for £315 at Mattress Man on 10th November 2026
Silentnight Memory 7 Sleep Single Mattress
The Silentnight Memory 7 Sleep is an all-foam mattress from one of Britain's best-known bed brands.
- Eases pressure at hips & shoulders
- Minimises partner disturbance
- Support right to the edge
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £495 at Mattress Man on 10th November 2026
Last seen for £535 at Mattress Man on 10th November 2026
Last seen for £479 at Mattress Man on 10th November 2026
Last seen for £425 at Mattress Man on 10th November 2026
Last seen for £395 at Mattress Man on 10th November 2026
Last seen for £315 at Mattress Man on 10th November 2026
Last seen for £329 at Mattress Man on 10th November 2026
Mattress details
Mattress
Silentnight Memory 7 Sleep Mattress
Size
Firmness
Medium
Construction
Foam
Memory Foam
Depth (cm)
Layers
2
Layer Details
Memory foam
A 30mm layer of memory foam sits on top and responds to your natural body heat. In practice this means it softens where you're warmest and moulds to your shape, giving that gentle, hugged-in feel memory foam is known for.
Miratex foam
Beneath the memory foam, Miratex foam provides support right up to the edge of the mattress, so you can use the full sleeping surface. Its movement absorption also eliminates roll together, which means you and a partner stay on your own sides rather than sinking towards the middle.
Layer details from mattressman.co.uk product page, September 2026.
Key benefits
- A footprint that leaves room to live: At 90cm wide it sits neatly against a wall in a child's room, leaving space for a desk, wardrobe and toy storage.
- Memory foam sized for growing sleepers: The heat-responsive top layer moulds around a lighter body too, which means teens get pressure relief on hips and shoulders as they grow.
- Edge support across a narrow bed: Miratex foam supports right to the edge, useful on a single where the full 90cm is the whole sleeping surface.
- Works in rooms with second jobs: In a spare room doubling as an office, or two beds for siblings with a walkway between, this size keeps the floor usable.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, and both are the most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child or teenager moving up from a cot bed or outgrowing a small single, you sleep alone in a compact room, or you're kitting out a guest room or student flat where the frame is already provided. It also suits a loft conversion where the bed tucks under the slope and only a narrow footprint will fit.
Consider another size if...
You're an adult who spreads out in your sleep, or you share the bed even occasionally, and 90cm will feel tight. 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.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Will the UK single Silentnight Memory 7 Sleep fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk, cabin and mid-sleeper frames, so width and length should be fine. Raised frames also limit mattress depth for guard rail safety, though, so check your frame's maximum depth against the retailer listing before you buy.
Is the UK single Memory 7 Sleep suitable for a child?
Yes, the UK single is the standard children's bed size, and the memory foam top softens with body heat to shape around lighter sleepers. Silentnight doesn't publish a firmness rating, so if your child has a strong preference for a firmer or softer feel, check with the retailer first.
How much floor space does a UK single mattress need?
The mattress itself is 90 x 190cm, and we suggest allowing at least 2.1m x 2.8m of floor space so there's room to walk alongside and open drawers or doors. That's comfortably the smallest requirement in the range, which is why singles suit box rooms and lofts.
Is a single big enough for an adult guest?
For occasional guests, yes. At 3ft wide it gives one adult a full-length sleeping surface, and the edge-to-edge Miratex support means the whole 90cm is usable rather than soft at the sides. For a regular adult sleeper, sizing up to the UK double, which is 45cm wider, is more comfortable.
What bedding fits the single size of this mattress?
Standard UK single fitted sheets and a single duvet, 135 x 200cm, fit this size. Both are the cheapest and most widely stocked bedding in any supermarket or department store, which keeps ongoing costs down, handy for children's rooms where bedding gets replaced often.