Bodyshape Boost 800 Pocket Memory Super King Mattress
The Bodyshape Boost 800 Pocket Memory Mattress combines a memory foam comfort layer with 800 pocket springs, which means you get a cushioned, sink-in surface with a supportive core underneath.
- Cushioned sink-in feel
- Firmer edges reduce roll-off
- Breathable fibres help dispel heat
£299
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Bodyshape Boost 800 Pocket Memory Mattress
More available sizes
Mattress details
Mattress
Bodyshape Boost 800 Pocket Memory Mattress
Size
Firmness
Medium Soft
Construction
Foam
Memory Foam
Pocket Spring
Rolled
Depth (cm)
25
Layers
4
Layer Details
Memory foam layer
A memory foam layer that adapts around your body. That gives you a sink-in, cushioned feel and helps ease pressure.
Reflex foam layer
A layer of Reflex foam that offers durable comfort. It adds resilience beneath the memory foam so the surface should keep its feel.
Soft white fibres layer
Soft white fibres that encourage open airflow. This helps dispel heat and moisture so you sleep more comfortably.
Pocket spring core
A core of 800 pocket springs, each in its own fabric pocket, with firmer springs on the outer rows. This gives supportive, responsive sleep and reduces the roll-off feeling at the edges.
Layer details from mattressonline.co.uk product page, November 2026.
Key benefits
- 90cm each for two: Two people sharing get 90cm each, which means a partner who turns over repeatedly is far less likely to wake you.
- 15cm more each than a UK king: Each sleeper gains 15cm over the UK king at the same length, so every bit of the extra size goes into side-to-side room.
- Space for children and dogs: When a child or a large dog joins you, the 180cm width leaves both adults enough room to stay put instead of clinging to the edges.
- Firmer springs at the sides: The outer rows of the 800 pocket springs are firmer, which reduces the roll-off feeling when a small visitor nudges you towards the edge.
- In proportion with a large room: In a period property or a generous master bedroom, a UK super king fills the floor sensibly where a UK king can look slightly lost.
This size suits you if...
You share with a partner who tosses and turns, or children and dogs end up in the bed most nights, 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 a tight landing makes a 180cm-wide mattress awkward to get upstairs. We'd recommend the UK king instead, where we suggest at least 2.7m x 2.9m.
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FAQ's
Is the Bodyshape Boost 800 super king big enough for two adults and a child?
Two adults get 90cm each in a UK super king, so a young child in the middle takes some of that rather than squeezing anyone off. The medium soft memory foam lets each person sink in a little, so you will feel a small child close by, but the width keeps everyone from being pushed to the edge.
Bodyshape Boost 800 super king vs king: how much bigger is it?
The UK super king is 30cm wider than the UK king, and both are the same length. That works out at 15cm more each for two people sharing. The room needs to be larger too: we suggest at least 3m x 2.9m for the UK super king, against at least 2.7m x 2.9m for the UK king.
What size bedroom do I need for a UK super king Bodyshape Boost 800?
Allow at least 3m x 2.9m, and more if you want bedside tables on both sides with room to walk round. In a loft conversion, the sloping ceiling usually decides which wall the headboard goes against, so measure the full-height floor area rather than the whole room. Check that the door can still open fully past the bed corner.
Will a super king mattress fit up my stairs and round the landing?
At 180 x 200cm, a UK super king is the size most likely to catch on a tight landing turn or a narrow bedroom doorway. Measure the narrowest point of the route, including any turn at the top of the stairs, before you order, then compare the retailers listed on this page for this mattress.
What bedding fits a UK super king mattress?
You need super king fitted sheets and a 260 x 220cm duvet. The Boost 800 is 25cm deep, so check that the fitted sheet's pocket depth covers that comfortably. Super king bedding tends to cost more and has fewer choices on the high street, so budget for at least two sets of sheets when you buy the mattress.