Silentnight SleepResponse Support 3600 Combination King Size 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
£2,299
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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
- More room each than a UK double: You each get 75cm, which is 7.5cm more per person than a UK double, so an elbow or a turn is less likely to land on your partner.
- Length for taller sleepers: At 200cm long, the UK king adds 10cm over a UK double, which means a partner near six foot can stretch out without their feet meeting the edge.
- Cooler foam for two bodies: Silentnight says the graphite-infused memory foam is 15% cooler than standard memory foam, which helps when a shared bed tends to build up heat overnight.
- Room for propping pillows: During pregnancy and the months after, the 150cm width leaves more space for a bump pillow or extra propping without crowding your partner towards the edge.
- Space for different schedules: If one of you rises hours before the other, the extra width gives the early riser more room to slip out without leaning across the bed.
This size suits you if...
You share the bed every night and keep waking each other on a UK double, or one of you is approaching six foot and needs the extra length, and you both tend to run warm under the covers.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Silentnight SleepResponse Support 3600 UK king big enough for two people?
Yes, for most couples. The UK king gives you 75cm each, which is 7.5cm more per person than a UK double. That extra margin can make a restless partner less noticeable. If either of you sprawls, or a dog regularly takes more than its share, the space may still feel slightly tight.
What size bedroom do I need for a UK king mattress?
We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m giving comfortable room. New build master bedrooms can feel smaller once fitted wardrobes go in, so measure the floor space left after furniture, then compare the retailers listed on this page.
Is a UK king mattress long enough if you're over 6ft?
The UK king is 200cm long, or 6ft 6in, which adds 10cm over a UK double. For a partner near or a little over six foot, that length is often the real reason to upgrade, since it leaves room for a pillow at the top and feet at the bottom.
Should I get the UK king or UK super king in this mattress?
Both are 200cm long, so the choice is width. The UK super king gives 90cm each, which is 15cm more per person than the UK king, but we suggest at least 3m x 2.9m for it. If your room fits a UK super king and you disturb each other a lot, it's the roomier option.
What bedding fits a UK king Silentnight mattress?
King sheets fit, and a 230 x 220cm king duvet covers the width comfortably for two. Silentnight doesn't publish a depth for this mattress, so check the depth with the retailer before choosing fitted sheets, and pick a pocket depth that suits it.