Kaymed Smart Phase 2000 Pocket Hybrid Single Mattress
The Kaymed Smart Phase 2000 Pocket Hybrid pairs an 85mm layer of Smart Phase foam, infused with phase-change crystals plus copper and microbeads to help regulate temperature, with a core of 2,000 pocket springs (a count based on the kingsize).
- Phase-change foam for hot sleepers
- Soft pressure relief for side sleepers
- Supportive bounce from pocket springs
£758
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.
Kaymed Smart Phase 2000 Pocket Hybrid Mattress
More available sizes
Mattress details
Mattress
Kaymed Smart Phase 2000 Pocket Hybrid Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Hybrid
Depth (cm)
32
Layers
2
Layer Details
Smart Phase foam
An 85mm layer of Smart Phase foam infused with patented phase-change crystals, which absorb and release body heat as you sleep. Copper and microbeads are added to the mix to further promote temperature regulation, so hot sleepers should feel the benefit most.
Pocket springs
A core of 2,000 pocket springs, each secured in its own fabric pocket, which means the springs move independently and respond to your body rather than the whole bed shifting. The sturdy spring material is designed for supportive bounce and durability.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Fits where other beds won't: At 3ft x 6ft 3in, the UK single works in box rooms and loft conversions where a wider bed would dominate the floor.
- Cooling that suits warm-sleeping teens: The Smart Phase foam absorbs and releases body heat, which means a teenager who kicks the duvet off should stay noticeably more comfortable.
- A gentle feel for lighter bodies: The medium soft surface cradles rather than resists, so children, teens and lighter adults get proper pressure relief instead of lying on top of a firm slab.
- Room to live around it: We suggest at least 2.1m x 2.8m of floor space, which leaves space for a desk, wardrobe or toy storage in a typical child's bedroom.
- Practical for guest rooms: Two UK singles give a spare room flexibility that one bigger bed can't, and single bedding is the cheapest and easiest to find.
This size suits you if...
You're furnishing a child's or teenager's room where the bed has to share the floor with a desk, wardrobe and storage, you sleep alone and want a cooler, softer mattress without giving over the whole room to the bed, or you're setting up a spare room that spends most of its week as an office.
Consider another size if...
You're an adult who finds 90cm of width restrictive, or you tend to sprawl in your sleep. We'd recommend the UK double instead: it's 45cm wider, the same length, and we suggest at least 2.6m x 2.8m of floor space for it.
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
What size is the Kaymed Smart Phase 2000 UK single?
The UK single measures 90 x 190cm, or 3ft x 6ft 3in. It's the standard British one-person size, so ordinary single fitted sheets and a standard single duvet fit without any hunting for unusual bedding.
Will the Kaymed Smart Phase 2000 single fit a bunk or mid sleeper?
The width matches standard bunk and cabin frames, but at 32cm this is a deep mattress, and many raised frames set a maximum depth so the guard rail still does its job. Check your frame's stated limit before buying; on a top bunk especially, a slimmer mattress is often the safer choice.
Is the Kaymed Smart Phase 2000 single good for a child or teenager?
It's a strong fit. The medium soft feel gives lighter bodies genuine cushioning, and the phase-change foam helps warm-sleeping teens stay comfortable. It's a substantial spend for a child's room, though, so it makes most sense for a teenager who'll use it for years rather than a young child who may soon size up.
How much floor space does a single Kaymed Smart Phase 2000 need?
We suggest allowing at least 2.1m x 2.8m. That gives you space to walk alongside the bed and open drawers or wardrobe doors, which matters in a child's room where the bed competes with storage, or in a spare room that also holds a desk.
Should I buy the Kaymed Smart Phase 2000 in a UK single or a UK double?
The UK single is 45cm narrower than the UK double, and the two are the same length. For a child, a teen or a compact spare room, the UK single is the sensible pick. If an adult will sleep on it every night and the room allows at least 2.6m x 2.8m, the UK double is the more comfortable long-term choice.