TheraPur ActiGel Polar 2000 Combination King Size Mattress
The TheraPur ActiGel Polar 2000 Combination Mattress pairs a graphite-infused ActiCool+ cover with zoned ActiGel foam, which means you get a cooler feel and cushioning that eases pressure.
- Graphite-infused cover for a cool feel
- Zoned foam eases pressure
- Minimises partner disturbance
£1,119
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
TheraPur ActiGel Polar 2000 Combination Mattress
More available sizes
Mattress details
Mattress
TheraPur ActiGel Polar 2000 Combination Mattress
Size
Firmness
Medium Firm
Construction
Foam
Gel
Pocket Spring
Depth (cm)
26
Layers
4
Layer Details
ActiGel foam
Zoned ActiGel foam that TheraPur says controls heat better than traditional memory foam. It eases pressure while keeping you cooler than a standard memory foam would.
PurFibre comfort layer
A resilient PurFibre layer that adds gentle cushioning. It softens the feel a little without taking away the supportive medium-firm rating.
Platinum 3D comfort layer
A breathable layer that enhances airflow and responsiveness. You get less trapped heat and a mattress that reacts quickly when you move.
ActiCool+ cover
A graphite-infused knitted cover, described as TheraPur's coolest ever feel. It gives you a cool-feeling surface when you first lie down.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Room to spread out: The UK king is 15cm wider than the UK double, which means each of you gets 7.5cm more space and fewer elbows in the night.
- Quieter early starts: If one of you leaves for work hours before the other, the extra width and wrapped pocket springs help keep that movement on their side of the bed.
- Length for taller partners: At 200cm long, the UK king adds 10cm over the UK double, so a partner over six foot is less likely to have feet hanging off the end.
- Cooler with two bodies: Two people share heat on any mattress, and the graphite-infused cover and breathable Platinum 3D layer are designed to stop a shared bed feeling stuffy.
- Familiar imperial size: In old money the UK king is 5ft x 6ft 6in, the standard size couples usually mean when they talk about upgrading from a double.
This size suits you if...
You share the bed every night and keep waking when your partner moves, one of you is approaching or over six foot, or you've outgrown a UK double but your bedroom can't take anything bigger.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m, or you both still feel cramped. For a smaller room we'd recommend the UK double, which needs at least 2.6m x 2.8m; for more space, the UK super king.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Will a UK king TheraPur ActiGel Polar 2000 fit in my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. New build master bedrooms can look generous empty but shrink once fitted wardrobes go in, so measure from the wardrobe doors, not the walls, and leave space to walk round both sides.
Is the TheraPur ActiGel Polar 2000 king size long enough for someone over 6ft?
The UK king is 200cm long, 10cm more than the UK double. For a partner over six foot, that extra length is often the real reason to upgrade, more so than the added width, because it gives room for a pillow and feet without hitting the end.
How much space do two people get on a UK king ActiGel Polar 2000?
Each sleeper gets 75cm on a UK king. That's 7.5cm more each than the UK double, but 15cm less each than the UK super king, which gives 90cm per person.
Is a king or super king better for a couple who disturb each other?
The pocket springs reduce movement on both sizes, so the difference is space. The UK king suits most couples, although if you also share with a dog or one of you sleeps spread out, the UK super king is 30cm wider and needs at least 3m x 2.9m of room.
Does a king size ActiGel Polar 2000 work during pregnancy?
A UK king gives you 75cm each, which leaves some room for a pregnancy pillow and frequent position changes without crowding your partner. The medium firm feel offers support, although if you prefer to sink in as your body changes, you may find it a little firm.