Sleepeezee SensaGel 4000 Mattress
Mattress
Sleepeezee SensaGel 4000 Mattress
Size
Firmness
Firm
Construction
Depth (cm)
30
Layers
9
Layer Details
- Cool-touch knitted cover. A knitted cover with a cool-touch finish, which means the surface feels cooler when you first lie down. Helpful if you're a warm sleeper.
- Pillow top: soft comfort layer. A soft layer at the top of the pillow top that provides the initial cushioning you feel when you get into bed.
- Pillow top: high-density support layer. A denser layer beneath the soft one, which means the cushioning doesn't collapse under your weight. It keeps the pillow top feeling supportive rather than saggy.
- Pillow top: memory foam. Memory foam moulds to your shape, easing pressure at the shoulders and hips. This is part of what softens the firm feel at the surface.
- Pillow top: Dreamzone profiled body-contouring gel foam. A profiled gel foam that contours to your body, which means support follows your shape rather than pushing back uniformly. The gel element also helps with heat.
- Pillow top: mini springs. Small springs within the pillow top add responsiveness, so the surface springs back quickly when you move. This makes changing position easier than on all-foam tops.
- Core: traditional pocket springs. Individually wrapped springs that move independently, which means less motion transfer to your partner and support tailored to where your body needs it.
- Core: mini springs. A second layer of mini springs in the core adds a finer level of responsiveness beneath the main pocket springs.
- Core: high-density support layer. A firm base layer that anchors the whole mattress, giving the springs a stable foundation and helping edge-to-edge durability.
Layer details from furniturevillage.co.uk product page, September 2026.
- Room to settle apart: The UK king gives 7.5cm more each than a UK double, which means you can lie still on your own side without brushing shoulders all night.
- Less felt from the other side: Individually wrapped pocket springs move independently, which means a partner rolling over or getting up at dawn carries less movement across to you.
- Length for taller sleepers: At 200cm, or 6ft 6in, the UK king is 10cm longer than a UK double, so a partner over six foot is less likely to have feet hanging off.
- Easier to shift position: Mini springs in the pillow top spring back quickly, which helps when you're rearranging pillows through pregnancy or turning often and want the extra width to move into.
- Firm edges for getting up: The firm hybrid build and high-density base give a steady surface to push off from, useful on a wider bed if you're recovering and getting in carefully.
- Cooler with two sharing: A cool-touch knitted cover and gel foam help with heat, which is welcome when two bodies share a mattress and one of you tends to run warm.
This size suits you if...
You share the bed every night and wake each other more than you'd like, one of you is over six foot and the length of a UK double has started to feel short, or you want firm support with enough width for pregnancy pillows.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once furniture is in. We'd recommend the UK double instead, and we suggest at least 2.6m x 2.8m for the UK double.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is the Sleepeezee SensaGel 4000 UK king long enough if you're over 6ft?
The UK king measures 200cm, which is 6ft 6in, and that's 10cm longer than the UK double. For a partner over six foot, that extra length is often a bigger change than the width. The pillow top also means your feet rest on cushioning rather than the hard edge of a shorter bed.
Will I feel my partner move on a SensaGel 4000 UK king?
Less than on a narrower bed. The pocket springs move independently, so movement stays closer to where it happens, and the UK king gives you 75cm each. If one of you leaves hours before the other, that combination of spacing and spring design means the early riser disturbs you a little less.
SensaGel 4000 UK king or UK super king for a couple?
The UK super king gives 90cm each, so the UK king gives 15cm less each, though both are the same length. If you have the room and one of you sprawls or the dog sleeps between you, the UK super king is the easier fit. We suggest at least 3m x 2.9m for the UK super king.
Is the SensaGel 4000 UK king a big enough upgrade from a double?
For most couples, yes. The UK king is 15cm wider and 10cm longer than a UK double, giving you 7.5cm more space each. It sounds small on paper, but you notice it most at night, when you can turn over without negotiating space with the person next to you.
Will the SensaGel 4000 UK king fit a new build master bedroom?
Measure after wardrobes and bedside tables are in, because new build rooms often shrink once furnished. We suggest at least 2.7m x 2.9m for the UK king, with 3.2m x 3.2m more comfortable. At 30cm deep, this mattress sits tall on a frame, so it can look larger in a snug room.