Silentnight SleepResponse Support 3600 Combination Small Double Mattress
The Silentnight SleepResponse Support 3600 Combination Mattress pairs Mirapocket zoned springs with graphite-infused cooling memory foam, which means you get targeted support underneath and a cooler, cushioned feel on top.
- Cooling foam for warm sleepers
- Memory foam cushions your body
- Zoned support across your body
£1,899
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Silentnight SleepResponse Support 3600 Combination Mattress
More available sizes
Mattress details
Mattress
Silentnight SleepResponse Support 3600 Combination Mattress
Size
Firmness
Construction
Memory Foam
Pocket Spring
Depth (cm)
Layers
3
Layer Details
Box top with CoolEase cover
An advanced box top design wrapped in a CoolEase cover that draws heat from your body. That helps you settle faster and stay comfortable if you sleep warm.
Support Memory Cool memory foam
Graphite-infused memory foam that Silentnight says is 15% cooler than standard memory foam. It cushions your body and eases pressure without trapping as much heat.
Mirapocket zoned support system
Pocket springs arranged in zones to support different parts of your body. Silentnight says the system improves posture for more restful sleep.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Room to spread out alone: At 30cm wider than a UK single, you can sleep diagonally or starfish without an arm dropping off the edge.
- Fits rooms a double crowds: The UK small double is 15cm narrower than a UK double, which can be the difference between a wardrobe door opening fully and catching the frame.
- Cooler foam for one warm body: Silentnight says the memory foam is 15% cooler than standard memory foam, which suits a solo sleeper who kicks the duvet off by midnight.
- Zoned springs across the full width: The Mirapocket zoned support system runs under you wherever you settle, so rolling towards one side still gives your shoulders and hips their own support.
- Easy bedding to find: A 4ft size is standard in the UK, so small double fitted sheets and a standard double duvet are straightforward to buy.
This size suits you if...
You sleep alone and like to spread out, your bedroom is compact but still meets our suggested minimum of 2.4m x 2.8m, or you're kitting out a guest room where a couple stays now and then rather than every night.
Consider another size if...
You share the bed with a partner every night. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m.
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FAQ's
Is a UK small double Silentnight SleepResponse Support 3600 big enough for two people?
For a weekend guest couple, yes, as long as both are comfortable sleeping close. For nightly sharing it gets tight, and we'd suggest the UK double, which is 15cm wider and gives 67.5cm each. Couples who both run hot may notice each other's warmth more on the narrower bed, cooling layers or not.
What size bedroom do I need for a UK small double mattress?
We suggest allowing at least 2.4m x 2.8m. That leaves space to walk round the bed and open drawers. In a loft conversion, measure the floor area where you can actually stand upright, since a sloping ceiling can make one side of the bed hard to reach.
Is a UK small double a good upgrade for a teenager outgrowing a single?
Often, yes. The UK small double is 30cm wider than a UK single and the same length, so it gives a growing teenager space to stretch out while using far less floor than a UK double. The cooling foam also suits teenagers who tend to sleep warm.
Will this mattress fit my 4ft bed frame?
The UK small double measures 120 x 190cm, or 4ft x 6ft 3in, which matches a standard 4ft frame. Silentnight doesn't publish a depth for this mattress, so check how high it might sit against a headboard or within a frame with raised sides before buying.
What sheets and duvet fit a Silentnight small double mattress?
Small double (4ft) fitted sheets fit, and a standard double duvet works well on top, giving a little overhang on each side. As Silentnight doesn't publish the depth, choose fitted sheets with generous pockets to be safe, as a box top design can sit deeper than a plain one.