TheraPur ActiGel Tundra 5000 Combination Super King 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
£1,919
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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
- A full 90cm each: With 90cm each for two people sharing, a partner who turns over all night has room to do it without ending up on your side.
- Distance does the heavy lifting: Individually wrapped springs dampen movement, but in a UK super king they sit alongside real physical distance, which helps far more with a genuinely restless partner than a comfort layer can.
- Room for night-time visitors: When a child arrives at 3am or a large dog settles near your feet, the full 6ft of width means both adults still keep a usable share of the firm surface.
- All the extra goes sideways: Against the UK king it is 30cm wider at the same length, giving 15cm more each, so every bit of the gain is elbow room.
- In proportion in big rooms: In a period property or a generous master bedroom, the 6ft x 6ft 6in footprint looks settled where a UK king can seem slightly lost.
This size suits you if...
You share the bed every night with a partner who tosses and turns, children or a dog regularly end up in it too, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom falls short of 3m x 2.9m, or a tight landing would make a 180cm-wide mattress a struggle to carry upstairs. We'd recommend the UK king instead, for which we suggest at least 2.7m x 2.9m.
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FAQ's
How big a bedroom do I need for a UK super king Tundra 5000?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable once bedside tables are in. Before ordering, check the door swing and any landing turns, as a 30cm deep mattress at this width is awkward to manoeuvre. Measure the route first, then compare the retailers listed on this page.
Is a UK super king worth it over a UK king if my partner is restless?
For a genuinely restless partner, usually yes. The UK super king is 30cm wider than the UK king at the same length, which gives 15cm more each. The wrapped springs help absorb movement, but extra distance between you makes a bigger difference to how often you're woken.
Can two adults and a child sleep on a super king TheraPur mattress?
For the occasional night, a small child fits between two adults on 180cm of width without anyone ending up on the edge. The reinforced foam border means the outer few centimetres stay usable, so the adults can shift outwards a little. Older children every night is a tighter squeeze.
What bedding fits a UK super king mattress that is 30cm deep?
You'll need super king sheets and a 260 x 220cm duvet. Check that fitted sheets have pockets deep enough for a 30cm mattress, since shallow ones slip off the corners. Bedding at this size costs more than king sets, so factor in that cost before you buy.
Will a super king mattress fit in a loft conversion bedroom?
Only if you have the full 3m x 2.9m at a height you can actually stand in. In most loft conversions the slope decides where the bed goes, usually with the headboard against the tallest wall. If the sloping ceiling eats into that space, the UK king is the safer fit.