TheraPur ActiGel® Glacier 4000 Combination Mattress
- In-stock
- Finance available
- Free delivery
- Returns
- Support: Pocket Spring
- Comfort: Gel Foam
- Brand: TheraPur
From £1099.00
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BedBoy Score
A composite score drawn from aggregated customer sentiment across verified reviews, with construction-type benchmarks for categories where reviewer commentary is limited. See our scoring methodology.
across 1 measured categories
Per-category breakdown below. The composite is the unweighted mean of every scored category, rounded to one decimal place.
- Brand
- TheraPur
- Retailer
- Dreams
- Delivery time
- Good
- Customer sentiment
- Average
- Guarantee
- Excellent
About the TheraPur ActiGel® Glacier 4000 Combination Mattress
Last checked
The fit here is driven by cooling as much as by support: the TheraPur ActiGel® Glacier 4000 is a combination mattress using a graphite-infused ActiCool®+ cover, 4cm of zoned ActiGel® foam and a spring base made up of pocket and micro springs. This is a cooling-first hybrid. The medium comfort grade puts it in the broadest part of the market, but the build is not a simple pocket-sprung mattress with a token foam pad; 4cm of gel foam is a meaningful comfort layer, especially when paired with micro springs intended to add surface response rather than deep pushback. Against traditional open-coil mattresses, the spec is generous on pressure relief and motion control, while the cooling story is more substantial than the usual breathable-cover wording because both the cover and gel layer are aimed at heat movement. The practical limit is support tone: zoned gel can soften pressure around shoulders and hips, but the mattress still depends on medium tension and spring response rather than the firmer, more braced feel found in higher-tension orthopaedic pocket-sprung builds.
For sleepers who overheat and prefer a cushioned surface, the cooling cover and gel layer line up with the strongest praise: the surface is repeatedly described as cooler on contact, with better sleep following for those who dislike the dense warmth of standard memory-foam hybrids. Softness is the dividing line. Although the manufacturer positions this as medium and suitable for most sleep positions, the lived feedback leans softer than that label suggests, and the repeated complaint is that it can feel plusher than expected, with one lower-scoring experience escalating into early middle dipping and back strain. That makes it more convincing for side sleepers and lighter-to-average builds wanting pressure relief at the shoulder and hip than for heavier back sleepers, front sleepers, or anyone who needs firmer lumbar lift from the centre of the mattress. Couples get a sensible spring set-up on paper, because pocket and micro springs usually reduce partner disturbance better than open-coil units, but a softer comfort stack can make weight differences more noticeable if one person creates a hollow. The Glacier 4000 suits hot sleepers and side-leaning couples who want a cushioned cooling hybrid; those prioritising firm back support or resistance to early dipping should look instead at firmer pocket-sprung hybrids in a higher-tension tier.
Pros and Cons
Pros
- Owners note the cooling effect is felt immediately upon lying down.
- Several buyers report effective temperature regulation throughout the night.
- Motion transfer is significantly reduced, leading to fewer disturbances from sleep partners.
- Recent customers appreciate the medium comfort level suits various sleeping positions.
Cons
- Multiple owners find the mattress feels softer than advertised, impacting support.
- Several reviews mention noticeable sinking in the middle within weeks of use.
- Some buyers experienced increased back pain due to the mattress softness.
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Written by
Giselle Green, Editor in Chief
Last checked by Giselle Green on . Scoring follows our scoring methodology.
Specifications
Manufacturer specifications without the jargon, easy to scan and compare.
100 Night Comfort Guarantee - gives you peace of mind when you buy
A 100 Night Comfort Guarantee allows for a trial period where the product can be tested in your own home environment to see if it meets personal comfort standards. If it doesn't meet your expectations, it can be returned for a refund or exchange, offering flexibility and assurance in purchasing decisions.
Medium comfort rating - balances softness and support
A medium comfort rating offers a balanced experience, providing adequate support without being too firm, while still ensuring a gentle, plush feel for relaxation. It caters well to a variety of sleeping positions, making it an adaptable choice for those who desire both comfort and support.
Made locally in the UK - British craftsmanship at its finest
Expertly crafted locally, this specification ensures exceptional quality and supports local industry. Buying products made in the UK often results in superior durability and reduced environmental impact due to shorter transportation distances.
Responsive pocket springs - individually wrapped for targeted support
Individually wrapped pocket springs adjust independently to body contours, offering personalized support and reducing motion transfer. This construction enhances comfort by evenly distributing body weight, ensuring restful sleep.
Adaptive micro springs - respond to even the tiniest movement
Enhanced flexibility ensures support tailored to even slight shifts in position, reducing potential pressure points. This feature promotes uninterrupted rest by accommodating movement efficiently.
Sumptuous pillow top - for an extra layer of cosy comfort
An additional pillow top layer enhances softness and delivers a more luxurious sleeping experience. This feature ensures a plush feel, contributing to an overall increase in comfort during rest.
ActiGel® technology - for advanced cooling and support
Graphite ActiCool®+ cover - offers TheraPur®’s coolest ever feel
Extended 10-year guarantee - so you can rest easy in lasting comfort
Reader reviews of the TheraPur ActiGel® Glacier 4000 Combination Mattress
BedBoy publishes reader-submitted reviews to broaden the sentiment sample. Reviewer purchase status is not independently verified at submission. For verified-purchase ratings, see the Trustpilot block below. Submit a review, quoting 131-01263 in the subject line.
The Glacier 4000 is designed to help prevent overheating at night, offering a noticeably cooler feel from the moment you lie down. Its cooling cover and thick gel layers work together to provide effective temperature regulation and gentle pressure relief without retaining heat. The combination of pocket and micro springs minimises motion transfer, helping reduce disturbances from a partners movements, while the foam border enhances stability and creates a spacious feel across the entire surface. With a medium comfort grade, this mattress serves as a versatile option that supports a wide range of sleeping positions.
The mattress we received was good quality but felt much softer than what we were expecting. I think if you like a soft mattress its the one for you.
Absolutley Fabulous! Genuinely was skeptical on how good nights sleep i could have with this mattress, but definetly recommend.
Verified retailer reviews
Independent Trustpilot reviews of Dreams.
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