TheraPur ActiGel Tundra 5000 Combination Double Mattress
The TheraPur ActiGel Tundra 5000 Combination Mattress pairs 5cm of zoned ActiGel foam with layers of pocket springs, which means a firm, supportive feel with pressure relief and temperature regulation built in.
- Firm feel for back & front sleepers
- Zoned foam helps regulate temperature
- Minimises partner disturbance
£1,599
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TheraPur ActiGel Tundra 5000 Combination Mattress
More available sizes
Mattress details
Mattress
TheraPur ActiGel Tundra 5000 Combination Mattress
Size
Firmness
Firm
Construction
Foam
Gel
Pocket Spring
Depth (cm)
30
Layers
5
Layer Details
ActiCool+ cover
A graphite-infused knitted cover right at the top of the mattress. It's the surface you feel first.
Zoned ActiGel foam
5cm of zoned ActiGel foam, there for pressure relief and temperature regulation. It adds some give to the firm feel and helps you stay comfortable through the night.
PurFibre comfort layer
A bouncy PurFibre layer that adds extra cushioning and comfort. It takes the edge off the firm feel without changing the mattress's firm rating.
Micro pocket springs
Two layers of supportive micro pocket springs that respond to even the slightest movement. They help the mattress adapt as you shift position.
Individually wrapped pocket springs
Individually wrapped, motion-absorbing pocket springs. Each spring moves on its own, so you're less likely to be disturbed by a partner.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Room for two without crowding the room: At 135 x 190cm, the UK double fits comfortably in a typical bedroom where a UK king would push the furniture against the walls.
- Less disturbance at close quarters: Individually wrapped pocket springs move on their own, which means you're less likely to feel your partner turn over when you each have 67.5cm.
- Usable right to the edge: A reinforced foam border supports the sides, so the full width of the UK double stays usable instead of rolling away beneath whoever sleeps nearest the edge.
- Firm support for two back or front sleepers: The firm feel suits couples who both sleep on their back or front, with 5cm of zoned ActiGel foam taking a little of the hardness off the surface.
- Bedding that's easy to find: Double sheets and a 200 x 200cm double duvet fit the UK double, and they're sold almost everywhere at every budget.
This size suits you if...
You share the bed with a partner who also likes firm support, and your bedroom is around 3m x 3m with room for bedside tables on both sides. It also suits you if you're furnishing a guest room for visiting couples, or you sleep alone and want space to stretch out on a firm surface.
Consider another size if...
One of you sprawls, or 67.5cm each already feels tight on your current bed. We'd recommend the UK king instead, which gives 75cm each; allow at least 2.7m x 2.9m for it.
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FAQ's
Is the TheraPur Tundra 5000 UK double big enough for two people?
For most couples, yes. The UK double gives you 67.5cm each, which is comfortable if you both keep to your own side. The pocket springs absorb motion, so a restless partner is less likely to wake you, although broad-shouldered couples or anyone who sprawls may find the space a little snug.
What size bedroom do I need for a UK double Tundra 5000?
We suggest at least 2.6m x 2.8m. If you want a bedside table on each side and space to open a wardrobe door without squeezing past the bed, around 3m x 3m is the more comfortable norm. Measure the room with any existing furniture in place before you decide.
Should I get the Tundra 5000 in a UK double or a UK king?
The UK double is 15cm narrower and 10cm shorter than the UK king. You give up 7.5cm each, because the UK king gives 75cm each for two sharing, but the UK double fits smaller rooms. Choose the UK king only if your room allows at least 2.7m x 2.9m.
Will a UK double mattress fit up narrow stairs?
Measure first. This mattress is 135 x 190cm and 30cm deep, so check every turn on the stairs and any tight landing against those figures, especially in an older terrace or a compact new build. Once you're sure it will go up, compare the retailers listed on this page.
What bedding fits the Tundra 5000 UK double?
Standard double sheets and a 200 x 200cm double duvet fit. The mattress is 30cm deep, so check that a fitted sheet's pocket depth is labelled for deep mattresses, otherwise the corners may keep springing loose overnight.