Beyond mattresses, TheraPur offers divan and ottoman bases with fabric, storage and headboard choices, plus cooling bedding and a topper. Owners disagree about both mattress firmness and cooling. Paying more for a deeper gel layer won't settle either question for you.
Free collection agreed is my condition for buying a TheraPur, because owners report a lot of dipping. With that in place, I'd shortlist the medium-firm Polar 2000 for most people and the soft-medium Alaska 6000 for a lighter side sleeper.
Without an agreed exit route, I wouldn't buy
Several owners across older TheraPur listings describe indentations or a raised middle between their sleeping positions, and dipping reports also appear across the newer range. I know, collection arrangements aren't the exciting part of mattress shopping. Get the comfort-return agreement in writing anyway, because returning a mattress you dislike and claiming for a fault involve different terms.
A Polar 2000 owner reports dips where they sleep and gel building up in the middle. An Alaska owner describes channels beneath each sleeper with a hump between them. On the Glacier, an owner reports sinking in the middle within weeks; on the Arctic, an owner describes a central dip within months. With all these expedition names, a crevasse down the middle is an unfortunate detail to find in owners' accounts.
Read the sag clause as well as the comfort-return terms. Ask Dreams how dipping is assessed, what evidence you'll need and whether collection is free under the agreement you're offered. The distinction matters: a mattress that feels uncomfortable doesn't necessarily meet the retailer's definition of a fault. File the written answer alongside your order confirmation, ready for any return.
Firmer doesn't buy you out of the problem: the Tundra gets the same condition as the rest of the range, deeper gel or not. Agreed free collection removes a potential cost if you decide to return it.
Shortlist the firmness you can live with
Medium-firm is my starting point, but your build and the way you sleep matter: lighter bodies generally need more give, heavier bodies need more resistance, and side sleepers need room for their shoulders and hips to sink. Polar, Arctic, Glacier, Tundra, Alaska: lovely itinerary, but you only need to shortlist a mattress that fits how you sleep.
The TheraPur ActiGel Polar 2000 Combination Mattress is medium firm, with 20mm of ActiGel and Purfibre over pocket springs. It has the least gel depth of these models and is single-sided. Shortlist it for a medium-firm starting point, particularly if you sleep on your back. A couple of owners found it too firm, including someone who felt it differed from the shop version, so lighter side sleepers should look towards the Alaska.
The soft-medium TheraPur ActiGel Alaska 6000 Combination Mattress has the deepest ActiGel layer at 6cm, with Purfibre over pocket springs, and is also single-sided. Several owners praise its comfort. Shortlist it for a lighter side sleeper who likes sinking into the surface; skip it if you know you want a firm, level feel beneath you.
The medium TheraPur ActiGel Glacier 4000 Combination Mattress sits between those choices, with 4cm of ActiGel over pocket and micro springs. A couple of owners found it softer than expected, while a couple found it harder. Skip it if you need a predictable medium. To my mind, the micro springs add less appeal than getting the main spring support and comfort layer right.
The firm TheraPur ActiGel Tundra 5000 Combination Mattress combines 5cm of ActiGel with pocket and micro springs. An owner praises its firm edge; another describes a husband who loves the very firm feel while she doesn't, prompting a move to dual tension. Sharing a bed doesn't oblige you to agree about everything. Look at split-tension mattresses when your preferred feels differ.
The TheraPur ActiGel Arctic 3000 Combination Mattress is firm to very firm, with 3cm of ActiGel over pocket and micro springs. A few owners found the firmness wrong for them or harder than in store. Shortlist the Arctic or Tundra only when you already know you want firm; extra firmness isn't an upgrade everyone needs.
The cooling promise runs ahead of owners' experiences
Expect modest help from gel foam and be more sceptical about a cooling cover. Dreams advertises zoned ActiGel and a graphite-infused ActiCool+ cover, including language about "eliminating overheating". I'd keep my eyebrows raised at that wording while judging the mattress on its feel and return agreement.
Polar 2000 owners disagree: one no longer wakes hot, another feels no cooling difference. An Alaska owner hasn't noticed the cooling, and an Arctic owner calls it non-existent. A couple of Glacier owners wanted more cooling, including someone using a protector. Keep that realistic expectation whichever firmness you shortlist; a deeper gel layer doesn't guarantee you'll feel cooler.
Gel foam gets a modest yes from me; cooling covers get much less enthusiasm. You can like the surface without planning your bedding around the promise. Keep your room cool and choose a duvet that suits how warm you sleep. Overheating wakes me, so I say this with feeling: a cool room and the right duvet will do more for you than any cover.
Match accessories to your sleeping position too. Several owners find the Memory Foam Ice Pillow too firm or tall, so skip it if you prefer a low, soft pillow. Several find the Cool Pillow Protector Pair too thick or tight. Matching the brand isn't a reason to accept the wrong pillow height.
