Silentnight Memory 800 Pocket Mattress
Mattress
Silentnight Memory 800 Pocket Mattress
Size
Firmness
Construction
Depth (cm)
24
Layers
2
Layer Details
- Memory foam. The top layer gently moulds to the contours of your body, which means pressure points like hips and shoulders feel cushioned rather than pressed against the springs. It provides that slow, hugging comfort memory foam is known for.
- Mirapocket springs. Beneath the foam, 800 Mirapocket springs respond independently to your movements, giving zoned support and improved spinal alignment. Because each spring works on its own, motion transfer across the bed is reduced.
Layer details from silentnight.co.uk product page, September 2026.
- Real space for one: At 30cm wider than the UK single, this size lets a solo sleeper stretch out without giving the room over to the bed.
- Fits compact rooms: Being 15cm narrower than the UK double, it can be the difference between a door that clears and one that doesn't in a box room or studio.
- Memory foam where you land: The memory foam top layer moulds to your shoulders and hips, which means pressure relief wherever you settle across the full 120cm width.
- Springs for occasional sharing: The 800 Mirapocket springs respond independently, so a guest couple sharing for a weekend won't feel every turn the other makes.
- Standard 4ft bedding: Small double is a standard UK size, so fitted sheets and frames are easy to find, and a standard double duvet works fine on top.
This size suits you if...
You're a solo adult who has outgrown a single and wants space to sprawl, your bedroom or loft conversion can't take a full double without losing walking room, or you're furnishing a guest room or small second bedroom in a rental where couples stay occasionally rather than nightly.
Consider another size if...
You share the bed every night, in which case 120cm gets tight for two adults over time. We'd recommend the UK double instead, which is 15cm wider and needs a room of at least 2.6m x 2.8m.
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Is a small double Silentnight Memory 800 big enough for a couple?
For occasional nights, yes. The 800 Mirapocket springs move independently, so two people sharing won't disturb each other much, and the medium feel suits most sleepers. For every night, 120cm is a squeeze for two adults, and we'd suggest sizing up to the UK double, which is 15cm wider.
What room size do I need for a small double mattress?
We suggest at least 2.4m x 2.8m for the UK small double. That allows space to walk around the bed and open drawers or a wardrobe. In a loft conversion, also check where the ceiling slopes, since a 120cm wide bed may fit where a 135cm one leaves no standing room.
Should I get the Silentnight Memory 800 in a small double or a double?
It comes down to your room and who sleeps there. The UK small double is 15cm narrower than the UK double, both are the same length, and the narrower footprint suits box rooms and studios. If you share nightly and your room meets our suggested 2.6m x 2.8m minimum, the UK double is the better long-term buy.
Is a small double worth it over a single for one person?
If you have the room, usually yes. The UK small double is 30cm wider than the UK single at the same length, which is a noticeable difference if you shift about or sleep on your side with arms out. The memory foam layer means you get the same pressure relief across that extra width.
Where can I buy the Silentnight Memory 800 in a small double?
It's stocked as a standard 4ft size rather than a special order, so availability is reasonable. Compare the retailers listed on this page; the prices shown here are updated as retailers change them, so what you see reflects the current market rather than a snapshot.