TheraPur ActiGel Alaska 6000 Combination 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
- Leaves room for bedside tables: We suggest a room of at least 2.6m x 2.8m, which means many standard master bedrooms can take this bed with a small table on each side.
- Shared space for side sleepers: Each of you gets 67.5cm, which suits couples who mostly sleep on their sides and stay in their own half of the bed.
- Cooler cover for two: The graphite-infused ActiCool+ cover is designed to draw away heat and moisture, which helps when two people's warmth builds up under one duvet.
- Bedding is easy to find: Standard double sheets and a 200 x 200cm double duvet fit, so you can use what you already own or buy new without hunting for odd sizes.
- A welcoming guest bed: In a spare room, the medium soft feel gives visiting couples some give at the shoulders and hips without taking over the whole floor.
This size suits you if...
You share with a partner in an average-sized bedroom and still want space for drawers and bedside tables, or you sleep alone with a dog or cat that claims a corner and you like a soft, roomy bed.
Consider another size if...
You and your partner are both broad-shouldered or restless and find 67.5cm each a squeeze. We'd recommend the UK king instead, provided your room allows at least 2.7m x 2.9m.
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FAQ's
Is the TheraPur Alaska 6000 UK double big enough for two people?
For most couples, yes. You each get 67.5cm, which suits two side sleepers who keep to their own half. The medium soft foam lets you sink in a little, so if one of you sprawls or you're both broad across the shoulders, the bed can feel slightly snug.
What size bedroom do I need for a TheraPur Alaska 6000 double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m giving a more comfortable amount of space. At the smaller end, check that you can still open wardrobe doors and fit a bedside table on each side before you commit.
Should I get the TheraPur Alaska 6000 in a double or a king?
The UK double is 15cm narrower and 10cm shorter than the UK king, which works out at 7.5cm less each for two people. If either of you is tall or you often disturb each other, the UK king is the safer choice, but we suggest at least 2.7m x 2.9m for it.
What sheets fit a UK double TheraPur ActiGel mattress?
Standard double fitted sheets and a 200 x 200cm double duvet fit. TheraPur doesn't publish a depth for this mattress, so check the pocket depth on any fitted sheet, or measure the mattress once it arrives.
Will a UK double TheraPur mattress fit up narrow stairs?
At 135 x 190cm, it can be awkward on turning staircases in older terraces or on tight new build landings. Measure your stairwell, landing and bedroom door, then compare the retailers listed on this page to see how each one supplies the mattress.