SleepSoul Balance 800 Pocket Memory King Size Mattress
The SleepSoul Balance 800 is a hybrid mattress that pairs a 2cm memory foam top with 800 pocket springs, which means you get gentle pressure relief on the surface and independent support underneath.
- Less roll-together for couples
- Memory foam eases pressure points
- Edge-to-edge spring support
£229
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SleepSoul Balance 800 Pocket Memory Mattress
More available sizes
Mattress details
Mattress
SleepSoul Balance 800 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Rolled
Memory Foam
Depth (cm)
23
Layers
2
Layer Details
Memory Foam
A 2cm top layer that responds to body temperature, which means it softens where you press into it and spreads your weight evenly for soothing pressure relief. It's a slim layer, so expect a gentle cushion rather than a deep sink-in feel.
Pocket Springs
800 pocket springs run edge to edge and react independently to your movements, giving personalised support with no roll-together. That independence means you're less likely to be disturbed when a partner shifts in the night.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Room for two: The UK king gives you 7.5cm more each than the UK double, which means fewer elbows and less negotiating over the middle of the bed.
- Less partner disturbance: The 800 pocket springs react on their own, so when one of you turns over, the other half of this wider surface stays noticeably calmer.
- Extra length: At 200cm long, the UK king adds 10cm over the UK double, a relief if your feet currently hang off the end.
- Springs to the edge: The springs run edge to edge, which means you can use the full width of the UK king rather than drifting towards the centre.
- Easy to read at a glance: In imperial terms the UK king is 5ft x 6ft 6in, handy if your bed frame or old mattress is labelled that way.
This size suits you if...
You share the bed every night and keep bumping into each other on a UK double, or one of you gets up hours before the other and you want to stir less. It also suits you if one partner is over six foot and length matters more to you than width.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Will I feel my partner move on the SleepSoul Balance 800 UK king?
Less than on a smaller bed. The 800 pocket springs respond independently, so movement on one side travels only a little, and the UK king gives you 75cm each, so there is more distance between you. If you sleep lightly and your partner rises early, that combination makes it easier to stay asleep.
Is the SleepSoul Balance 800 UK king long enough if you're over 6ft?
It is the best option in this range for tall sleepers. The UK king is 200cm long, 10cm longer than the UK double, UK small double and UK single versions of the Balance 800. If one of you is over six foot, that extra length is often a bigger comfort gain than the added width.
Does the SleepSoul Balance 800 come in a super king?
No. The UK king is the largest size SleepSoul lists for the Balance 800, so couples who want a UK super king will need to look at a different mattress. For most couples, the UK king's 150 x 200cm is a comfortable step up from a UK double.
How much bigger is the Balance 800 king than the Balance 800 double?
The UK king is 15cm wider and 10cm longer than the UK double. Shared between two people, that works out as 7.5cm more each. It sounds modest on paper, but it is the difference between brushing against each other all night and having a little space of your own.
Will a SleepSoul Balance 800 UK king fit a new build master bedroom?
Measure before you buy, because new build bedrooms often feel smaller once fitted wardrobes are in. We suggest at least 2.7m x 2.9m for a UK king. If your room falls short, the UK double of the same mattress needs at least 2.6m x 2.8m, and it gives you the same feel.