TheraPur ActiGel Alaska 6000 Combination Small Double Mattress
The TheraPur ActiGel Alaska 6000 Combination Mattress pairs a graphite-infused ActiCool+ cover with a 6cm layer of zoned ActiGel foam, which means a medium-soft feel that manages heat and supports where you need it.
- Graphite cover keeps you cooler
- Zoned foam support where needed
- Medium-soft feel for side sleepers
£1,999
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TheraPur ActiGel Alaska 6000 Combination Mattress
More available sizes
Mattress details
Mattress
TheraPur ActiGel Alaska 6000 Combination Mattress
Size
Firmness
Medium Soft
Construction
Foam
Gel
Depth (cm)
Layers
2
Layer Details
ActiCool+ cover
A graphite-infused cover at the very top of the mattress, designed for heat control and moisture wicking. It's the first thing you lie on, so it helps you stay cooler. The cover is also free from chemicals.
ActiGel zoned foam layer
A 6cm layer of zoned ActiGel foam, TheraPur's deepest, which supports the areas of your body that work hardest. TheraPur says ActiGel transfers heat faster than standard memory foam, so it should feel less warm too.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Room to sprawl on your own: At 30cm wider than the UK single, you can draw up a knee or roll over on the medium soft foam without finding the edge.
- Fits where a double won't: It's 15cm narrower than the UK double, which can decide whether a box room door swings open freely or catches on the bed frame.
- Cooler in a small, closed room: Warmth builds quickly in a compact bedroom, so the graphite-infused ActiCool+ cover, designed to wick moisture, should help if you often wake up hot.
- A soft guest bed for short stays: Couples can share it for a weekend visit, and guests who sleep on their side will likely find the medium soft feel easy to settle into.
- Straightforward bedding: Buy fitted sheets sold as small double (4ft) and pair them with an ordinary double duvet, both easy to find on the high street.
This size suits you if...
You sleep alone and keep running out of room in a single, or you're furnishing a compact spare room where a visiting couple might share for the odd weekend.
Consider another size if...
You share the bed with a partner every night. We'd recommend the UK double instead, which gives 67.5cm each for two sharing; we suggest at least 2.6m x 2.8m for the UK double.
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FAQ's
Is the TheraPur ActiGel Alaska 6000 small double big enough for two people?
For a guest couple staying a night or two, yes. For nightly sharing it's a squeeze, and the soft foam lets you drift towards each other a little. The UK double gives 67.5cm each for two sharing, and we suggest at least 2.6m x 2.8m for the UK double.
What size bedroom do I need for a UK small double TheraPur Alaska 6000?
We suggest allowing at least 2.4m x 2.8m. That leaves space to walk round the bed and open a wardrobe. If your room is smaller, the UK single needs at least 2.1m x 2.8m by our guidance, though you'd lose 30cm of width.
How long is a UK small double mattress for tall sleepers?
The UK small double is 190cm long, or 6ft 3in, the same length as the UK single and UK double. If your feet already reach the end of a standard bed, the UK king is 10cm longer, but it needs at least 2.7m x 2.9m by our guidance.
Will a small double TheraPur Alaska 6000 suit a loft conversion?
Often, yes. Being 15cm narrower than the UK double, it can leave a usable strip of floor beside the bed under a sloping ceiling. TheraPur doesn't publish a depth for this mattress, so check the height you'll have above it, and measure the stairs first, then compare the retailers listed on this page.
Is a small double a good upgrade for a teenager outgrowing a single?
It can be, as it adds 30cm of width without eating much floor space. The medium soft feel suits a teenager who sleeps on their side. If they're heavier or prefer lying on their back on a flatter surface, they may find this mattress too forgiving.