Sleepeezee Memory 4000 Pocket Hybrid Ortho King Size Mattress
The Sleepeezee Memory 4000 Pocket Hybrid Ortho is a medium firm hybrid that pairs memory foam with a 4000-spring system, made up of 1000 traditional pocket springs and 3000 mini comfort springs.
- Medium-firm support, soft pillow top
- Minimises partner disturbance
- Made in the UK
£899
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Sleepeezee Memory 4000 Pocket Hybrid Ortho Mattress
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Mattress details
Mattress
Sleepeezee Memory 4000 Pocket Hybrid Ortho Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
30
Layers
6
Layer Details
Pillow Top
An additional layer of plush fillings sewn onto the top, which means a softer initial feel when you lie down. You get cushioned comfort without changing the medium firm support underneath.
Knitted Cover
A soft knitted cover that's breathable, helping to keep you at an even temperature through the night.
Body-Contouring Memory Foam
Super-soft memory foam that adapts to your shape, easing pressure on your joints. Its slow response minimises bounce, so you're less likely to feel a partner moving.
Soft Polyester Comfort Layers
Soft polyester layers that add cushioning without compromising the medium firm feel.
High-Density Polyester Support Layer
A denser polyester layer beneath the comfort fillings, which helps the mattress hold its structure and last longer.
4000 Pocket Spring System
1000 traditional pocket springs combined with 3000 mini comfort springs. Each spring moves independently, which means support that follows your body rather than pushing back as one flat surface.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Room to lie apart: Each of you gets 75cm, which is 7.5cm more than on a UK double, enough to stop elbows meeting when you both turn over.
- Quieter shared nights: Memory foam absorbs movement slowly, and on a UK king there is also more distance between you, so an early riser is less likely to wake a late sleeper.
- Extra length for tall partners: At 200cm, the UK king is 10cm longer than a UK double, which means feet stay on the mattress rather than hanging over the end.
- Support across a wide surface: The 1000 pocket springs and 3000 mini springs respond to each body separately, so a heavier and a lighter partner can each get support suited to them.
- Fits more bedrooms than a super king: We suggest at least 2.7m x 2.9m for a UK king, against 3m x 2.9m for the UK super king, which matters in a typical master bedroom.
This size suits you if...
You share the bed every night and a UK double leaves you brushing against each other, or one of you gets up hours before the other and you want that movement kept on their side. It also suits you if a partner is approaching 6ft and the extra length matters as much as the width.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m, or you sleep alone most nights. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Sleepeezee Memory 4000 UK king long enough for someone over 6ft?
The UK king measures 200cm long, or 6ft 6in, which is 10cm more than the UK double. That extra length gives a tall sleeper space to stretch out, and the pillow still sits on the mattress. The UK super king is the same length, so sizing up to it gives you more width but no extra length.
Will I feel my partner getting up on a UK king Memory 4000?
You're less likely to. The memory foam responds slowly and dulls movement, while the pocket springs move independently rather than as one sheet. On a UK king you also lie further apart than on a UK double. Across a wide mattress that combination tends to keep an early alarm or a restless partner on their own side.
How much space does each person get on a Sleepeezee Memory 4000 UK king?
Two people sharing get 75cm each. On the UK double the figure is 67.5cm each, so the UK king adds 7.5cm per person. If you want more still, the UK super king gives 90cm each. Most couples who feel crowded in a UK double find the UK king enough.
Should I choose the UK king or UK super king Memory 4000?
Pick the UK super king if your room allows at least 3m x 2.9m and you want 90cm each. Otherwise the UK king gives 15cm less each, needs at least 2.7m x 2.9m, and leaves more floor space around the bed. Both are 200cm long, so taller sleepers gain nothing on length by going bigger.
Is a UK king Memory 4000 a good upgrade from a double for couples?
For most couples, yes. The UK king is 15cm wider and 10cm longer than a UK double, so you get space in both directions. The medium firm feel and pillow top stay the same, so the difference you notice is the extra room between you and at your feet.