SleepSoul Bliss 800 King Size Mattress
The SleepSoul Bliss 800 is a pocket spring mattress with 800 individual springs, which means each spring moves on its own so you feel less of your partner's tossing and turning.
- Plush pillow-top comfort
- Springs that move with you
- Medium feel suits most sleepers
£405
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SleepSoul Bliss 800 Mattress
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Mattress details
Mattress
SleepSoul Bliss 800 Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Depth (cm)
Layers
2
Layer Details
Pillow-top
A soft pillow-top with plush fillings sits at the surface. It adds an extra layer of cushioning under your shoulders and hips, so the mattress feels softer to lie on than the medium firmness alone suggests.
800 pocket springs
Below the pillow-top, 800 pocket springs conform to your body and support you where you need it most. Because each spring works on its own, the mattress follows your shape rather than moving as one block.
Layer details from mattressman.co.uk and mynextmattress.co.uk product pages, October 2026.
Key benefits
- More room each: You get 75cm each rather than the 67.5cm a UK double allows, which means 7.5cm more to turn over without meeting an elbow.
- Length for taller sleepers: At 200cm long, the UK king adds 10cm over a UK double, so anyone close to six foot is less likely to have their feet at the edge.
- Quieter nights for early risers: The wider surface puts a little more distance between you, and the 800 pocket springs move separately, so one person getting up should jolt the other less.
- Space without a super king footprint: You gain real sleeping room while needing less floor than a UK super king, which we suggest needs at least 3m x 2.9m.
- Live retailer prices: Compare the retailers listed on this page, where prices are updated as retailers change them.
This size suits you if...
You share the bed every night and a double has started to feel like a negotiation, one of you is tall enough that length matters as much as width, or your alarms go off hours apart and you want a better chance of the later sleeper staying asleep.
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
Is the SleepSoul Bliss 800 UK king long enough for someone over 6ft?
The UK king is 200cm long, which is 10cm longer than the UK double and UK small double versions of the Bliss 800. If one of you is tall and your feet already reach the end of a double, the length may be the upgrade you notice most, even more than the width.
How much more space do we each get on a UK king Bliss 800 than a double?
Sharing a UK king gives you 75cm each. A UK double gives 67.5cm each, so the UK king adds 7.5cm per person. That sounds modest on paper, but it is often the difference between drifting into each other overnight and having your own side.
Will the Bliss 800 in a UK king fit a new build master bedroom?
We suggest allowing at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. New build bedrooms can feel smaller once fitted wardrobes and bedside tables go in, so measure the clear floor space rather than the room on the plan.
Should I choose the SleepSoul Bliss 800 in a UK king or a UK super king?
The UK super king is 30cm wider and gives 90cm each, which is 15cm more per person than the UK king. Both are the same length. If a dog regularly joins you, the UK super king may suit better, but we suggest at least 3m x 2.9m for that size.
Will a UK king pocket spring mattress stop my partner waking me?
It should help on two fronts. The UK king gives you 75cm each, so there is a little more distance between you, and the Bliss 800's springs move independently, so movement on one side travels less to the other. No mattress removes disturbance entirely, especially for light sleepers.