Sleepeezee SensaGel 12000 Super King Mattress
The Sleepeezee SensaGel 12000 is a soft hybrid mattress that pairs 12,000 mini and pocket springs with a pillow top filled with Dreamzone gel foam and memory foam.
- Soft feel with proper support
- Cool-touch cover & heat-drawing gel
- Removable pillow top keeps its shape
£2,774
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Sleepeezee SensaGel 12000 Mattress
More available sizes
Mattress details
Mattress
Sleepeezee SensaGel 12000 Mattress
Size
Firmness
Soft
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Gel
Depth (cm)
40
Layers
6
Layer Details
Cool-touch knitted cover
A knitted cover with a cool-touch finish, which means the surface feels pleasantly cool when you first lie down.
Pillow top
A topper filled with Dreamzone gel foam and memory foam for that plush, sink-in feel. It's removable, so you can turn and rotate it to help maintain its shape over time.
Dreamzone profiled body-contouring gel foam
This gel foam responds to your heat and pressure, moulding to your shape to relieve pressure points. It also helps draw heat away from your body, useful if softer mattresses usually leave you warm.
Soft comfort layer
An additional soft layer that adds to the gentle, cushioned feel before you reach the springs.
Mini springs and pocket springs
Mini springs sit alongside traditional pocket springs, each adjusting independently to your body. In practice this means support that follows your shape rather than a uniform push-back.
High-density support layer
A firm foundation at the base that keeps everything above it stable and supported.
Layer details from furniturevillage.co.uk product page, September 2026.
Key benefits
- Space to drift apart: You each get 90cm of width, which means a partner who turns all night is further away before the independently moving springs even start absorbing the movement.
- A wider soft surface: Soft pillow tops tend to gather sleepers towards each other, and 30cm of extra width over the UK king gives you more room before that happens.
- Room when the household joins you: When a small child or the dog climbs in, the UK super king still leaves each adult a usable share of the bed rather than a narrow edge.
- Made for a large room: In a big master bedroom or a high-ceilinged period room, a 180cm wide, 40cm deep bed looks in proportion where a UK king can look a little lost.
- Same length as the UK king: The UK super king and the UK king are both 200cm long, so choosing the wider bed takes no extra floor space at the foot.
This size suits you if...
You and your partner disturb each other at night and want the soft, cradling feel without lying close together, or your children or pets regularly end up in the bed, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your room is tighter than 3m x 2.9m, or you mostly sleep alone. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m and still gives two sharers 75cm each.
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.
FAQ's
Is the SensaGel 12000 super king big enough for two adults and a child?
For occasional visits, yes. The UK super king is 180cm wide, giving two adults 90cm each on their own, so a small child in the middle takes space from both of you without leaving anyone right on the edge. If it happens every night and your child is growing, the extra width becomes more valuable each year.
Sleepeezee SensaGel 12000 super king or king for a couple?
The UK super king is 30cm wider than the UK king and the same length, giving each of you 15cm more. That matters most if one of you moves a lot. Room is the deciding factor: we suggest at least 3m x 2.9m for the UK super king and 2.7m x 2.9m for the UK king.
Will I feel my partner move on a soft super king mattress?
Less than on a smaller size. The mini and pocket springs move independently, which helps isolate movement, and on a UK super king you each have 90cm, so there is simply more distance between you. Soft pillow tops can let you roll slightly towards a heavier partner, and width is the best counter to that.
Will a super king SensaGel 12000 work in a loft conversion bedroom?
It can, but the roof slope usually decides where it goes. At 180cm wide and 40cm deep, the bed and its headboard need a full-height wall, and you'll want to sit up without hitting the ceiling. Measure your standing headroom along the wall you plan to use before choosing the UK super king over the UK king.
What should I measure before ordering a 40cm deep super king?
Check that the bedroom door can still open fully with a 180 x 200cm bed in place, and that you'll have walking room on both sides. Allow for the 40cm depth too, as a tall mattress on a tall base can sit higher than you expect. We suggest the room is at least 3m x 2.9m.