Silentnight Memory 1400 Mattress
Mattress
Silentnight Memory 1400 Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
25
Layers
2
Layer Details
- Memory Foam. The top layer moulds to your body as you settle in, which means pressure is eased away from your muscles and joints. You should feel gently cradled rather than pushed back against.
- Mirapocket springs. Beneath the foam sit 1400 Mirapocket springs that respond independently to your every movement. In practice, that means support where you need it and better spinal alignment, with less motion carrying across the bed.
Layer details from silentnight.co.uk product page, September 2026.
- Space that solves restlessness: With 90cm each for two people sharing, a fidgeting partner is simply further away, and the pocket springs limit how much movement carries across anyway.
- Firm support across the full width: The extra firm feel stays consistent edge to edge, so nobody drifts into a soft middle even on a 180cm wide surface.
- Room for company: When a child pads in at 3am, or the dog treats the bed as routine, a UK super king means everyone still gets a workable share.
- Cooler sharing at a distance: Memory foam can hold a little warmth, but at this width you are less likely to lie pressed against a warm partner all night.
- Fits the room the bed deserves: In a large master or period bedroom where a UK king looks undersized, the 180cm width fills the space properly.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets regularly end up in with you. You also like a firm, supportive surface and have a bedroom of at least 3m x 2.9m to give it breathing room.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum, or you sleep alone. The UK king would suit you better: it is 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m for it.
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Will the Silentnight Memory 1400 super king fit up my stairs?
At 180 x 200cm and 25cm deep, this is a large, firm hybrid, and firm mattresses flex less than soft foam ones during a carry. Measure your stairwell, landing turns and door swings before ordering. If access is tight, the UK king is 30cm narrower at 150 x 200cm and noticeably easier to manoeuvre.
Is a UK super king worth it for a couple with young children?
If children join you at night with any regularity, yes. The 180cm width gives two adults 90cm each, so an extra small body is an inconvenience rather than a takeover. The firm surface also helps here: nobody rolls into a dip, and the 1400 pocket springs keep wriggling from travelling across the bed.
How much space do two people get on the Memory 1400 in a UK super king?
You get 90cm each for two people sharing, which is the width of a UK single per person. Combined with pocket springs that respond independently to movement, that distance makes a restless partner far easier to sleep through. It is the main reason to pick this size over the UK king, which is 30cm narrower.
What room size does a super king Memory 1400 need?
We suggest a bedroom of at least 3m x 2.9m, which leaves enough clearance to walk round both sides and open drawers. In a loft conversion, check the sloped ceiling too: the 180cm width limits which wall the bed can sit against. If your room is smaller, the UK king needs at least 2.7m x 2.9m.
Does the firm feel change in the super king size?
No, the extra firm feel and the memory foam over Mirapocket spring build are the same in every size. What changes at 180cm wide is how the bed behaves for two: more spring area under each sleeper, movement isolated across a greater distance, and support that stays even right across the surface.