Last seen for £335 at Mattress Man on 10th November 2026
Silentnight Memory 3 Sleep Double Mattress
The Silentnight Memory 3 Sleep Mattress is a memory foam mattress from one of Britain's best-known bed brands.
- Medium feel for most sleepers
- Memory foam softens pressure points
- Fits UK & EU bed frames
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 £395 at Mattress Man on 10th November 2026
Last seen for £449 at Mattress Man on 10th November 2026
Last seen for £395 at Mattress Man on 10th November 2026
Last seen for £335 at Mattress Man on 10th November 2026
Last seen for £345 at Mattress Man on 10th November 2026
Last seen for £255 at Mattress Man on 10th November 2026
Last seen for £249 at Mattress Man on 10th November 2026
Mattress details
Mattress
Silentnight Memory 3 Sleep Mattress
Size
Firmness
Medium
Construction
Foam
Memory Foam
Depth (cm)
Layers
2
Layer Details
Foam layer (top)
The first of two foam layers in an 18 cm mattress. Together they give the medium feel, with memory foam that softens as it warms and gives your hips and shoulders a gentler landing.
Foam layer (base)
The second foam layer sits beneath the first. It is part of an all-foam build, so you get a steady, sprung-free feel rather than the bounce of a pocket spring mattress.
Layer details from mattressman.co.uk and robertdyas.co.uk product pages, October 2026.
Key benefits
- A footprint most UK bedrooms can take: At 135 x 190cm, we suggest allowing at least 2.6m x 2.8m, which leaves space for a wardrobe and drawers in a typical room.
- Room for bedside tables on both sides: In a room around 3m x 3m, the UK double usually leaves enough clearance for a table each side, something a UK king often sacrifices.
- Foam that absorbs a partner's movement: Memory foam moulds around each sleeper as it warms, so a restless partner disturbs you slightly less than on a bouncier surface.
- An affordable way to sleep two: This model sits at the budget end for a big-brand memory foam mattress, and the UK double keeps costs sensible if you're furnishing a whole home at once.
- Easy to dress: Standard double sheets and a 200 x 200cm double duvet fit, 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 that couldn't comfortably take anything bigger, you're setting up a guest room that visiting couples will use, or you sleep alone and want space to spread out, perhaps with a dog or cat claiming a corner. It also suits anyone kitting out a first flat where the budget has to stretch across every room.
Consider another size if...
You and your partner both like space and your room measures at least 2.7m x 2.9m. The UK king is 15cm wider and 10cm longer than the UK double, and we'd recommend it instead for a noticeably easier share.
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FAQ's
Is the Silentnight Memory 3 in a UK double big enough for a couple?
Yes, with a caveat. The UK double is the long-standing British standard for two, giving 67.5cm each for two people sharing. Memory foam helps here, since it absorbs some of a partner's movement. That said, if either of you is broad-shouldered or a sprawler, the UK king's extra 15cm of width is a meaningful upgrade.
What room size do I need for the Silentnight Memory 3 UK double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That's our own guidance rather than Silentnight's. At the smaller end you'll fit the bed and a wardrobe; the roomier figure lets you add bedside tables on both sides without squeezing past the footboard.
Will a UK double Silentnight Memory 3 fit up narrow stairs?
Silentnight doesn't publish handling guidance for this size, so measure your tightest turn before ordering. All-foam mattresses like this one flex more than sprung designs, which helps on the turning stairs of older terraces and tight new build landings, but a 135cm-wide mattress still needs a clear route. Check with your chosen retailer about access.
Should I get the double or the king in the Silentnight Memory 3?
It comes down to your room. The UK double is 15cm narrower and 10cm shorter than the UK king, and it suits rooms where a king would dominate. If you can allow at least 2.7m x 2.9m and you share every night, the UK king is the more comfortable long-term buy for a couple.
Is a double Silentnight Memory 3 good for a guest room?
It's a sensible choice. The UK double accommodates visiting couples where a UK single wouldn't, and this model's low price suits a bed that's used a few weekends a year. Standard double bedding keeps dressing it cheap too. Compare the retailers listed on this page, as the prices shown are updated as retailers change them.