Kaymed Smart Phase 1600 Pocket Hybrid Mattress
Mattress
Kaymed Smart Phase 1600 Pocket Hybrid Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
27
Layers
3
Layer Details
- Smart Phase Foam. A 50mm layer of Kaymed's exclusive Smart Phase foam, infused with microbeads, copper and phase change crystals. It thermoregulates by moving heat away from the mattress surface, absorbing and releasing body heat to keep you at a comfortable temperature.
- Reflex Foam Comfort Layer. A soft, flexible reflex foam that sits between you and the springs. It adds the support needed for good spinal alignment without a hard, boardy feel.
- Pocket Springs Support System. 1600 pocket springs, based on the kingsize mattress, each housed in its own fabric pocket. They react independently to movement through the night, which means the mattress shapes around your body rather than tilting you towards a partner.
Layer details from mattressonline.co.uk product page, September 2026.
- Fits where other beds won't: At 90cm wide, it leaves room for a desk, wardrobe and toy storage in a child's bedroom, or a walkway between two beds where siblings share.
- Cooling for one warm sleeper: The Smart Phase foam layer moves heat away from the surface, which means a teen or guest who normally kicks the duvet off stays at a steadier temperature.
- Support that lasts through growth spurts: The medium firm tension and pocket spring core keep a growing teenager's spine aligned, rather than letting them sink into a soft dip.
- Usable right to the edge: The foam encapsulated border keeps the sides firm, useful on a narrow 90cm mattress where one sleeper often ends up near the edge.
- Works in a dual-purpose room: In a spare room that doubles as an office, a UK single tucks against the wall and still gives visiting guests a supportive night.
This size suits you if...
You're buying for one sleeper: a child moving up from a cot bed, a teenager who runs warm at night, or a guest room where the bed shares space with a desk. It also suits a student room or first flat where the frame is already provided and you want a mattress that supports one adult properly. Allow at least 2.1m x 2.8m of floor space.
Consider another size if...
Two of you will be sleeping in it, or you're a solo adult who likes space to spread out. We'd recommend the UK double instead; it's 45cm wider than the UK single, and we suggest at least 2.6m x 2.8m of floor space for it.
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What size is the Kaymed Smart Phase 1600 in a UK single?
The UK single measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so standard single sheets and a single duvet fit without any hunting for unusual bedding. It's the same length as the UK small double and UK double, so only the width changes if you size up later.
How much floor space does a UK single need?
We suggest allowing at least 2.1m x 2.8m of floor space. That gives you room to walk around the bed and open drawers or wardrobe doors comfortably. In a loft conversion or box room, the 90cm width is what makes a single workable where a UK double simply wouldn't leave a walkway.
Will the Kaymed Smart Phase 1600 single fit a bunk or mid sleeper frame?
The 90 x 190cm footprint matches standard UK bunk and mid sleeper frames, but check depth before you buy. This mattress is 27cm deep, which is taller than many frames allow: guard rails need to sit safely above the mattress surface. Measure your frame's maximum mattress depth against the manufacturer's guidance first.
Is the Kaymed Smart Phase 1600 UK single a good choice for a teenager?
It's a strong fit for a teen who sleeps hot, since the Smart Phase foam actively moves heat away rather than trapping it. The medium firm feel supports a growing body well, although a very lightweight side sleeper may find it slightly too solid. The 90cm width leaves space for a desk in most teenage bedrooms.
Is a UK single big enough for an adult?
Yes, for one adult. The UK single is the standard one-person size, and the pocket springs plus foam encapsulated border mean an adult gets full support across the whole 90cm surface. If you tend to sprawl or want more stretching room, the UK double is 45cm wider and the same length. To check current pricing, compare the retailers listed on this page.