Bodyshape Boost 800 Pocket Super King Mattress
The Bodyshape Boost 800 Pocket Mattress pairs 800 individually pocketed springs with a Reflex foam comfort layer, which means you get a medium feel with some cushioning on top and springs that move independently below.
- Medium feel for most sleepers
- Reflex foam cushioning on top
- Breathable knitted cover
£259
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Bodyshape Boost 800 Pocket Mattress
More available sizes
Mattress details
Mattress
Bodyshape Boost 800 Pocket Mattress
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Rolled
Depth (cm)
24
Layers
4
Layer Details
Microquilted comfort layer
A microquilted top filled with Reflex foam and cosy polyester fibres. It adds light cushioning over the springs, so the surface feels medium rather than hard.
Polyester fibre layer (above spring unit)
Dense polyester fibres sit above the spring unit. They add padding between you and the springs, so you feel the cushioning rather than the coils.
Pocket spring unit
800 individually pocketed springs, with the pockets secured together to form a single unit. Each spring works on its own, so the support follows your body.
Polyester fibre layer (below spring unit)
Dense polyester fibres sit below the spring unit. They form the underside of the mattress, between the springs and your bed base.
Layer details from mattressonline.co.uk product page, November 2026.
Key benefits
- Room to spread out: Each of you gets 90cm of width, so a restless partner's elbows and knees are far less likely to reach your side of the bed.
- Space for night-time visitors: When a child climbs in after a bad dream, a UK super king leaves the adults with somewhere to sleep rather than a thin strip on the edge.
- Springs that act separately: Across the full UK super king width, the 800 pocket springs each move on their own, so the support follows each sleeper's body rather than sagging as one.
- A step up from the UK king: You gain 30cm of width over the UK king, which is 15cm more each, while the length stays the same.
- Medium feel for different sleepers: A medium rating is a sensible middle ground on a bed this wide, where two people with slightly different preferences have to share one surface.
- Fits a generous master bedroom: In a period house or a large master, a UK super king fills the floor in proportion, where a smaller bed can look a little lost.
This size suits you if...
You share the bed with a partner who fidgets all night, and distance would help more than any amount of padding. It also fits if children or a large dog regularly end up in bed with you, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m, or narrow stairs and tight landing turns would make a 180cm-wide mattress a struggle. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Is the Bodyshape Boost 800 Pocket UK super king big enough for two adults and a child?
For the occasional visitor, yes. Two adults get 90cm each, so a small child tucked in the middle still leaves everyone a share of the bed. Because the 800 springs work individually, a wriggling child is less likely to tip the whole surface. If the arrangement is nightly and the children are getting bigger, the extra width will still feel finite.
What size bedroom do I need for a UK super king Bodyshape Boost 800?
We suggest at least 3m x 2.9m for a UK super king. That allows you to walk around the bed and open a wardrobe without shuffling sideways. Before ordering, check which way the bedroom door swings, because a door that opens towards the bed can clip the corner of a frame this wide.
How much more room does the Bodyshape Boost 800 Pocket super king give than the king?
The UK super king is 30cm wider than the UK king, which means 15cm more each for two people sharing. Both are the same length, so you gain width only. A taller sleeper will not notice any difference at the foot. The extra side space is what helps if a partner sprawls or a dog joins you.
Will a UK super king Bodyshape Boost 800 work in a loft conversion bedroom?
It can, but the sloping ceiling usually decides where the bed goes. Place the headboard against the tallest wall so neither of you sits up into the slope, and measure the floor area at full standing height rather than wall to wall. Then check the loft stairs, which are often the tightest turn in the house.
What bedding do I need for a Bodyshape Boost 800 Pocket super king?
You'll need super king sheets and a 260 x 220cm duvet. The mattress is 24cm deep, so choose fitted sheets made for at least that depth. Super king bedding often costs more than smaller sizes, so factor a full set into your budget alongside the mattress itself.