TheraPur ActiGel Tundra 5000 Combination 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
£1,199
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The TheraPur ActiGel Tundra 5000 Combination Mattress is a premium, firm, pocket-sprung mattress, 30cm deep. It combines a graphite-infused cover, zoned ActiGel foam and a PurFibre comfort layer with pocket springs, so you get firm support with a little cushioning. It comes in a UK single, UK small double, UK double, UK king, UK super king and EU small single. Dreams offers a 100-night comfort trial.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
30
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
10
Price Range
£1,199 to £1,919
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
Assessed from Therapur's published specification for this mattress, captured November 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The firm feel gives solid support, which suits back and front sleepers best. The 5cm of zoned ActiGel foam is there for pressure relief and temperature regulation, while the bouncy PurFibre layer adds cushioning so the firmness isn't harsh. Two layers of micro pocket springs respond to even small movements, and the individually wrapped springs absorb motion, so you're less likely to feel a partner turning over. A reinforced foam border supports the edges, and it's made in the UK. It suits most sleepers who want firm support, although anyone wanting a softer surface may find it too unyielding.
Key features & 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.
Best suited for?
Back sleepers
The firm feel gives solid support, and the PurFibre comfort layer adds enough cushioning that the firmness doesn't feel harsh when lying on your back.
Front sleepers
A firm comfort grade with two layers of micro pocket springs keeps the surface supportive, which suits lying face down.
Couples
Individually wrapped, motion-absorbing pocket springs move on their own, so you're less likely to feel a partner turning over during the night.
Warm sleepers
The graphite-infused ActiCool+ cover sits at the top, and 5cm of zoned ActiGel foam is there for temperature regulation through the night.
If you prefer sleeping on a softer mattress, this might not be the best choice. It has a firm comfort grade, and the foam and fibre layers only soften the surface a little. Lighter side sleepers may find it hard on the shoulders and hips. It also can't be flipped, so you only get one sleeping side.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
TheraPur ActiGel Tundra 5000 Combination Mattress
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FAQ's
How firm is the TheraPur ActiGel Tundra 5000 Combination Mattress?
It has a firm comfort grade. The PurFibre layer and ActiGel foam add some cushioning, but the feel stays firm, so it suits back and front sleepers better than people who want a soft surface.
How deep is the TheraPur ActiGel Tundra 5000 Combination Mattress?
It's 30cm deep. That's a fairly substantial mattress, so check that your bed frame and fitted sheets will take that depth before you order.
What sizes does the TheraPur ActiGel Tundra 5000 Combination Mattress come in?
It comes in a UK single, UK small double, UK double, UK king and UK super king. There's also an EU small single for smaller or non-standard bed frames.
Does the TheraPur ActiGel Tundra 5000 Combination Mattress come with a trial?
Dreams offers a 100-night comfort trial on it. That's Dreams' own offer rather than the brand's, so read Dreams' terms on returns before you buy.
Is the TheraPur ActiGel Tundra 5000 Combination Mattress good for hot sleepers?
It has a graphite-infused ActiCool+ cover and zoned ActiGel foam for temperature regulation. It should suit you if you sleep warm and like a firm feel, though a softer mattress would suit others better.
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