Silentnight UltraGel 3000 Cool-To-Touch Boxtop Medium Soft Mattress
Mattress
Silentnight UltraGel 3000 Cool-To-Touch Boxtop Medium Soft Mattress
Size
Firmness
Medium Soft
Construction
Depth (cm)
Layers
2
Layer Details
- UltraGel™ cool-to-touch layer. Cooling technology woven directly into the surface fabric, so the mattress feels cool from the moment you lie down. Silentnight claims five times greater breathability than standard memory foam, which means less of that trapped, clammy heat foam is known for.
- Mirapocket® springs. A base of 3000 Mirapocket springs, each one pocketed so it compresses individually under your weight. You feel targeted support at your hips and shoulders rather than a uniform push back.
Layer details from mattressman.co.uk product page, September 2026.
- A shared size that fits most rooms: At 135 x 190cm, the UK double leaves space in an average bedroom where the UK king would start to crowd the walls.
- Room for bedside tables on both sides: In a room around 3m x 3m, this size usually leaves enough clearance for a table and lamp each, which a wider bed often sacrifices.
- Independent springs matter more when sharing: The 3000 Mirapocket springs compress individually, which means less movement travelling across the bed when your partner turns over in the night.
- Cooling for two warm sleepers: Two bodies raise the temperature under one duvet, so the UltraGel cool-to-touch surface has more to do in a shared double than in a single.
- Easy to dress: Standard double sheets and a 200 x 200cm duvet fit this size, and both are stocked everywhere at every price point.
This size suits you if...
You share the bed every night and want the traditional couples' size in a room where a UK king would feel cramped, or you sleep alone and like space to stretch out. The medium soft feel suits side sleepers and lighter bodies, and the cool-to-touch surface is aimed at anyone who runs warm, which makes this size a sensible pick for two warm sleepers sharing.
Consider another size if...
You share with a restless partner and 67.5cm each for two people sharing feels tight, or your room comfortably exceeds 2.7m x 2.9m. We'd recommend the UK king instead: it's 15cm wider and 10cm longer.
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Is a UK double UltraGel 3000 big enough for two side sleepers?
It works, with a caveat. Two people sharing get 67.5cm each, and side sleepers take up less width than starfish sleepers, so most couples manage happily. The medium soft feel cushions shoulders and hips nicely on your side. That said, if either of you spreads out or shifts around a lot, the UK king gives you 15cm more width.
Will the UltraGel 3000 double fit up a narrow staircase?
At 135cm wide, the UK double is a manageable size for most staircases, though a hybrid with 3000 pocket springs is heavier and less bendy than an all-foam mattress, so tight turns in older terraces or narrow new build landings need thought. Measure your stairwell and any awkward corners before ordering, and check the retailer's delivery access guidance.
Is the double a good size for a guest room?
Yes, arguably the ideal one. A UK double accommodates visiting couples where a UK single can't, and its 135 x 190cm footprint still leaves floor space in a smaller second bedroom. One thing to weigh up: the medium soft feel divides opinion more than a medium does, so guests who prefer a firm surface may find it a little too cushioned.
What room size do I need for the UltraGel 3000 in a double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That larger figure gives you walking room on both sides of the bed and space for bedside tables, a wardrobe and a chest of drawers without squeezing past furniture every morning. Below the minimum, the UK single may serve the room better.
Should I get this mattress in a double or a small double?
It depends on who's sleeping in it. The UK double is 15cm wider than the UK small double, and for two people sharing every night that extra width is worth having. The UK small double suits a solo sleeper in a compact room, where we suggest at least 2.4m x 2.8m. Both are the same length, so height isn't a factor.