Feather & Black Belvoir Super King Mattress
The Feather & Black Belvoir is a firm tension pillowtop mattress that pairs 1,015 individually wrapped pocket springs (in the king size) with a layer of memory foam, which means you get firmer support underneath with a softer, cushioned surface on top.
- Firm support, cushioned pillow top
- Minimises partner disturbance
- 100-night trial
£659
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Feather & Black Belvoir Mattress
More available sizes
Mattress details
Mattress
Feather & Black Belvoir Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Memory Foam
Depth (cm)
28
Layers
3
Layer Details
Knitted pillowtop
A soft knitted pillowtop with a sumptuous pillow top finish, which adds extra depth. In practice this gives a cushioned first impression before you reach the firmer support below.
Memory foam
A layer of soothing memory foam that relieves pressure and works with the pocket springs beneath. It adapts to your movements during the night, so you get embracing support rather than a rigid feel.
Pocket springs
1,015 individually wrapped pocket springs in the king size. Each spring moves independently, which means support that follows your shape and less disturbance from a partner shifting about.
Layer details from featherandblack.com product page, September 2026.
Key benefits
- 90cm of width each: Two people sharing get 90cm apiece, which means you can both stretch out without negotiating an invisible border down the middle.
- Distance plus pocket springs: The individually wrapped pocket springs already limit motion transfer, and at this width a fidgeting partner is simply further away, so disturbance drops twice over.
- Space for night-time visitors: If children pad through at 3am, a 180cm wide mattress absorbs a third small body without anyone ending up clinging to the edge.
- Firm support across a big surface: The firm tension holds you level wherever you settle on the 6ft x 6ft 6in surface, so back and front sleepers stay supported even sprawled diagonally.
- Fills a large master properly: In a period property or generous new build master, a UK king can look undersized against the wall; the super king suits the proportions.
This size suits you if...
You share the bed every night with a partner who shifts, turns or steals the duvet, your children or pets treat your bed as an open invitation, or your master bedroom is large enough that a smaller mattress would look lost in it. The firm tension suits back and front sleepers who want that support spread across the widest footprint the Belvoir offers.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum for this size. The UK king is 30cm narrower and the same length, needs a room of at least 2.7m x 2.9m, and we'd recommend it instead.
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FAQ's
Is the super king Belvoir too big for my bedroom?
It measures 180 x 200cm, and we suggest a room of at least 3m x 2.9m so you can still open drawers and walk round the bed. If your room is smaller than that, the UK king is 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
Is a super king Belvoir worth it for a couple?
If one of you is a restless sleeper, yes. The pocket springs reduce how much movement travels across the mattress, and with 90cm each for two people sharing, most of your partner's tossing happens too far away to notice. Lighter side sleepers should still weigh the firm tension carefully first.
Can two adults and a child share the super king Belvoir?
At 180cm wide it's the most realistic size for it. A small child slotting in during the night still leaves both adults a workable share, and the firm tension keeps the surface stable rather than everyone rolling into a dip in the middle. It's a coping strategy, but a comfortable one.
How much wider is the super king than the king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length. That extra width is the whole argument for sizing up: it turns a shared bed from adequate into genuinely spacious, particularly if pets or children join you regularly.
Where can I buy the Belvoir in a super king?
Availability moves around, so compare the retailers listed on this page. The prices shown here are updated as retailers change them, which makes it a quicker check than visiting each site yourself.