Sleepeezee Witham Mattress
Mattress
Sleepeezee Witham Mattress
Size
Firmness
Construction
Depth (cm)
32
Layers
5
Layer Details
- Bamboo cover. An ultra-soft knitted bamboo cover wicks away moisture, which means less clamminess on warm nights. It also has a naturally antibacterial finish to help prevent odours forming.
- Pillow top. A cloud-like pillow top adds a plush, indulgent surface feel over the firm core. It includes a layer of cooling gel for soothing relief as you sleep.
- Staycool gel. Dual layers of Staycool gel regulate your temperature through the night. They also give pressure-sensitive support, adapting to where your body pushes in most.
- Pocket springs. 2,400 pocket springs in the king size move independently to cushion your body, which means less disturbance when a partner shifts. Highly adaptive nano pocket springs add a finer layer of support.
- Side support border. An enhanced side support border creates a durable edge around the mattress. This helps prevent dipping or sagging where you sit or sleep near the side.
Layer details from featherandblack.com product page, September 2026.
- A full 6ft of width: At 6ft x 6ft 6in, the UK super king lets two adults lie comfortably without negotiating over the middle.
- 90cm each for two sharing: That personal width, paired with independently moving pocket springs, means a partner who turns over repeatedly is far less likely to disturb you.
- 15cm more each than a UK king: The UK super king is 30cm wider than the UK king at the same length, so every extra centimetre goes into sideways space.
- Space for a small visitor: When a child wanders in at 3am or the dog settles at your feet, there is enough width that nobody ends up clinging to the edge.
- A usable edge across the wider bed: The reinforced side support border helps the outer edges hold their shape, which matters on a bed this wide where you may sleep nearer the side.
- Cooler with more bodies on board: Extra people and pets add heat, and the bamboo cover and Staycool gel layers are designed to help carry some of that warmth away through the night.
This size suits you if...
You share with a partner whose restless nights keep waking you, and a young child or a large dog ends up in the bed most nights too, or your master bedroom is generous enough that a UK king would look a little undersized against the walls.
Consider another size if...
Your bedroom is smaller than our suggested 3m x 2.9m, or tight door swings and landing turns make a large mattress awkward. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is the Sleepeezee Witham UK super king big enough for two adults and a child?
For occasional visits, yes. The UK super king measures 180 x 200cm and gives 90cm each to two adults, so a small child squeezed between you still leaves both of you room to turn. If the child joins you every night and is growing, the space does get tighter, but this is the widest the Witham comes.
How much bigger is the Sleepeezee Witham super king than the king?
The UK super king is 30cm wider than the UK king, and the two are the same length. Shared between two people, that works out as 15cm more each. If your main problem is a partner's movement rather than your height, the UK super king puts the extra space exactly where you need it.
Will a UK super king Witham suit a restless partner better than a UK king?
Usually, yes. The UK king gives 75cm each for two sharing, while the UK super king gives 90cm each. Pocket springs help limit movement travelling across the bed, but physical distance does more, so if your partner's tossing and turning is the reason you're shopping, the UK super king is the stronger choice.
Can I fit a Sleepeezee Witham super king in a loft conversion bedroom?
Possibly, but measure carefully. We suggest at least 3m x 2.9m for a UK super king, with around 3.5m x 3.2m feeling comfortable. In a loft conversion, a sloping ceiling often decides which wall the bed can go against, so check you still have standing room on the side you get out of.
Is the Witham super king a good size if our dog sleeps on the bed?
If the dog is large and joins you every night, the UK super king makes a real difference, as 90cm each for two people leaves a little margin before anyone is pushed to the edge. The firm pocket sprung core also stays supportive under an uneven spread of weight, which suits a bed shared with a pet.