TheraPur ActiGel Glacier 4000 Combination Single Mattress
The TheraPur ActiGel Glacier 4000 Combination Mattress pairs a graphite-infused cooling cover with zoned ActiGel foam and pocket springs, which means you get pressure relief with less trapped heat.
- Graphite-infused cover keeps you cooler
- Zoned foam eases pressure
- Springs absorb motion
£1,119
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TheraPur ActiGel Glacier 4000 Combination Mattress
More available sizes
Mattress details
Mattress
TheraPur ActiGel Glacier 4000 Combination Mattress
Size
Firmness
Medium
Construction
Foam
Gel
Pocket Spring
Depth (cm)
28
Layers
3
Layer Details
ActiCool+ cover
A graphite-infused cover that TheraPur describes as its coolest ever. It's the surface you lie on, so it's there to keep you feeling cooler through the night.
ActiGel foam
4cm of zoned ActiGel foam that relieves pressure without trapping heat. You get cushioning where your body needs it, without the warmth that foam can hold.
Pocket and micro springs
Responsive pocket and micro springs that absorb motion. They give the mattress its support and should limit how much you feel a partner moving.
Layer details from dreams.ie product page, November 2026.
Key benefits
- Leaves space for the rest of the room: We suggest at least 2.1m x 2.8m of floor for a UK single, which means a desk and wardrobe can usually stay in a child's bedroom.
- A cooler surface for warm sleepers: The graphite-infused ActiCool+ cover sits directly beneath you, which helps a teenager in a small, stuffy bedroom who tends to wake up too warm.
- A middle-ground feel for growing children: Medium sits between soft and firm, so a child who shifts from back to side sleeping as they grow should still find it comfortable.
- Two beds with a walkway between: A pair of UK singles suits siblings sharing a room, or a guest room set up for friends who'd rather not share a bed.
- Tucks under a sloping loft ceiling: The 90cm width slots beneath the slope of a loft conversion, where a wider bed would push out into the low side of the room.
- Depth to confirm on raised frames: At 28cm deep it may sit high on some bunk or mid-sleeper frames, so check the frame maker's maximum mattress depth before buying.
This size suits you if...
You sleep alone in a compact bedroom or loft conversion and tend to wake up warm, or you're furnishing a child's room or a guest room that needs two separate beds side by side.
Consider another size if...
You share the bed most nights, or you're an adult who likes room to sprawl. The UK small double would suit you better; we suggest at least 2.4m x 2.8m for it.
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FAQ's
Will the TheraPur ActiGel Glacier 4000 UK single fit a bunk bed?
It may, but check first. The mattress is 28cm deep, and bunk, cabin and mid-sleeper frames usually state a maximum mattress depth so the guard rail stays effective. The 90 x 190cm footprint matches a standard UK single frame, so depth is the measurement to confirm with the frame maker.
How much room do I need for a UK single TheraPur Glacier 4000?
We suggest at least 2.1m x 2.8m of floor space. That leaves walking room around a 90 x 190cm bed, with space for a small desk or chest of drawers in a child's room, or in a spare room that doubles as a home office.
Is a UK single big enough for an adult on the Glacier 4000?
For one adult who sleeps fairly still, yes. At 3ft x 6ft 3in it's the standard UK one-person size. If you're tall, the UK king is 10cm longer, although it's also 60cm wider, and we suggest at least 2.7m x 2.9m of room for it.
TheraPur Glacier 4000 single vs small double: which should I choose?
The UK single is 30cm narrower than the UK small double and the same length. If you sleep alone and floor space is tight, the UK single makes sense. If you want room to spread out, or a partner stays occasionally, choose the UK small double; we suggest at least 2.4m x 2.8m for it.
Can I fit two Glacier 4000 single mattresses in a guest room?
Often, yes, in a room that couldn't comfortably take a wide double. Two UK singles let guests who aren't a couple sleep apart, each on their own mattress. Measure for both beds plus a walkway between them, because our 2.1m x 2.8m minimum is for one UK single on its own.