TheraPur ActiGel Tundra 5000 Combination Single 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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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
- Leaves floor space free: At 3ft x 6ft 3in, the UK single fits in a child's room alongside a wardrobe and desk, and we suggest a room of at least 2.1m x 2.8m.
- Two beds, still a walkway: If siblings share or a guest room needs two beds, a pair of UK singles leaves space between them in a way one wider bed often can't.
- Firm support for one: The firm feel and two layers of micro pocket springs suit a back or front sleeper who has the whole width to themselves.
- Usable to the edge: A reinforced foam border supports the sides, which means a narrow UK single still feels secure when you sit on the edge to get dressed.
- Cooler surface in a small room: The graphite-infused cover and zoned ActiGel foam help with temperature regulation, which helps in a box room or a loft conversion where warm air collects.
This size suits you if...
You sleep alone and want firm support, or you're furnishing a child's or teenager's room where the bed shares space with storage and a desk. It also suits a spare room that works as an office most of the week, and a guest room where two separate beds give you more flexibility than one.
Consider another size if...
You share the bed, or you want room to spread out as one adult. The UK single is 30cm narrower than the UK small double, so we'd recommend the UK small double instead, with a room of at least 2.4m x 2.8m.
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FAQ's
Will a UK single TheraPur Tundra 5000 fit a bunk bed or cabin bed?
It will fit the 90 x 190cm base of a standard UK single bunk, cabin or mid-sleeper. The depth needs more care. The mattress is 30cm deep, and many raised frames give a maximum mattress depth so the safety rail stays high enough. Check the frame maker's guidance before you buy.
What size bedroom do I need for a UK single mattress?
We suggest a room of at least 2.1m x 2.8m for a UK single. That leaves space to walk around the bed and open a wardrobe. If you're placing two UK singles side by side for siblings or guests, measure for both beds and a walkway between them.
Is a firm UK single mattress suitable for a teenager?
It depends on how they sleep. The Tundra 5000 is firm, which suits back and front sleepers best. Lighter side sleepers may find it a little hard on the shoulders and hips, even with the ActiGel foam and PurFibre layers softening the surface slightly. If your teenager sleeps curled on their side, consider that before buying.
What bedding fits a 30cm deep UK single mattress?
Standard single sheets and a single duvet (135 x 200cm) fit the 90 x 190cm surface. The 30cm depth is the thing to check. Look at the pocket depth on a fitted sheet's packaging and make sure it covers a 30cm mattress, otherwise the corners may slip off.
Two UK singles or one UK small double for a guest room?
Two UK singles let you host friends who won't share a bed, and you can push them together for a couple. A UK small double takes less floor space than two UK singles but only suits one or two people who are happy to share. We suggest at least 2.4m x 2.8m for the UK small double. Measure the room, then compare the retailers listed on this page.