TheraPur ActiGel Glacier 4000 Combination Super King 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
£1,759
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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
- 90cm each for two: With 90cm each, you get 15cm more per person than the UK king, which means a restless partner has room to fidget before they reach your side.
- Distance plus motion absorption: Space does most of the work with a fidgety partner, and the pocket and micro springs absorb the movement that does travel, so you notice less of it.
- Room when the family piles in: When a child climbs in after a bad dream or a large dog settles at your feet, the 180cm width means the adults still keep a usable share.
- A cooler surface for a busier bed: More bodies in one bed means more warmth, so the graphite-infused cover, designed to keep you cooler, is a welcome feature when the bed is regularly shared by three.
- Same length as a UK king: The UK super king and UK king are both 200cm long, so moving up adds 30cm of width while taller sleepers keep exactly the same legroom.
This size suits you if...
You share the bed and are tired of feeling every turn your partner makes, or your mornings often start with a child or the dog in the middle, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your room is smaller than 3m x 2.9m, or a bed this wide would leave no space for bedside tables and the door. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Will a TheraPur Glacier 4000 super king fit in my bedroom?
We suggest at least 3m x 2.9m for a UK super king, and around 3.5m x 3.2m feels properly spacious. Check that the door can swing fully open with the bed in place. In a loft conversion, the sloping ceiling usually decides which wall the headboard goes against, so measure the full-height floor area rather than the whole room.
Super king or king Glacier 4000 for a restless partner?
The UK super king is 30cm wider than the UK king and the same length, giving 15cm more each when two of you share. With a genuinely restless partner, that extra distance helps more than any comfort layer, and the pocket and micro springs absorb some of the movement that remains. If your room allows the larger footprint, the extra width is worth having.
Is a UK super king big enough for two adults and a child?
Two adults get 90cm each on a UK super king, so a small child climbing in squeezes everyone a little, though it leaves far more room than a UK king or UK double would. The medium feel suits most sleeping positions, which helps when people shift around to make space in the middle of the night.
How do I get a super king mattress upstairs?
A UK super king is 180cm wide, so the tight spots are landing turns, narrow door frames and low ceilings on staircases. Measure each one, including any bend where the mattress has to tilt. In period properties with tight stairwells this matters most. Measure the route first, then compare the retailers listed on this page.
What bedding fits the Glacier 4000 in a UK super king?
You need super king fitted sheets and a 260 x 220cm duvet. The mattress is 28cm deep, so check that the fitted sheets have pockets deep enough to tuck under fully. Super king bedding costs more than king sets, so it's sensible to factor in a couple of sheet sets when budgeting for the move up.