Description
Specifications:
- 3741 pocket springs (in the king size)
- Medium comfort grade
- Quilted and layered with cooling ActiGel® foam
- Bouncy PurFibre® adds comfort and support
- Knitted ActiCool® cover is instantly cooling
- Superior edge support increases your sleep space
- Irresistible pillow top
- Fully hypoallergenic finish
- Mattress depth: 28cm
- Made in the UK
- Single-sided
- 100-Night Comfort Guarantee
- Rest easy with a 10-year guarantee
- Free UK delivery
TheraPur ActiGel® Glacier 3800 Mattress – Total Body Support for Uninterrupted Sleep
If you’re dreaming of a mattress that keeps you cool, comfortable, and fully supported, the TheraPur ActiGel® Glacier 3800 Mattress delivers on all fronts. A combined sleep system pairs pocket and micro springs with advanced cooling foams to support your body from head to toe—night after night.
If you prefer a similar cooling mattress with a firmer feel, consider the TheraPur ActiGel Alder Combination Mattress, designed for sleepers who want firm support with the same refreshing technology.
Pocket and Micro Spring Support That Adapts to You
At the heart of the mattress is a dual spring system, combining individually wrapped pocket springs with responsive micro springs. Together, they contour to every inch of your body while cushioning movement to minimise partner disturbance.
With up to 3741 springs in king size, the mattress offers targeted support and excellent pressure distribution across the entire sleep surface.
Cooling Comfort for Restful Sleep
For advanced temperature control, ActiGel® foam is stitched directly into the quilted top layer, positioning the cooling gel as close to your body as possible to combat overheating.
Inside the mattress, a 4 cm layer of ActiGel® foam cushions your joints and delivers instant pressure relief. The foam is divided into responsive zones, optimising airflow to help maintain a comfortable sleep temperature throughout the night.
Reinforced Edges and Luxurious Pillow Top Feel
Supportive foam around the mattress border provides enhanced edge stability, maximising your usable sleep space and preventing the roll-off sensation.
The surface is finished with a plush pillow top, creating an irresistible sink-in feel while maintaining dependable support. Wrapped in a breathable ActiCool® knitted cover, the mattress helps draw heat away from the body for a cooler, more comfortable night’s sleep.
Product Overview
| Specification | Details |
|---|---|
| Comfort & Feel | |
| Comfort Grade | Medium |
| Mattress Depth | 28 cm |
| Support & Materials | |
| Spring Count | 2079 (Single), 2737 (Small Double), 3164 (Double), 3741 (King), 4504 (Super King) |
| Filling | 4 cm ActiGel® foam and PurFibre® |
| Cover & Cooling | |
| Cover Fabric | ActiCool® knitted cover |
| Cooling Technology | ActiGel® foam quilting with zoned airflow |
| Construction & Origin | |
| Construction Type | Single-sided |
| Country of Origin | Handmade in the UK |
| Warranty | |
| Guarantee | 10 years + 100-Night Comfort Guarantee |
Who Is This Mattress Best For?
-
Sleepers who prefer a medium comfort feel
-
Hot sleepers needing advanced cooling
-
Couples seeking reduced motion transfer
-
Those who enjoy a pillow top sink-in feel
-
Allergy-sensitive users
Disclosure
Prices are updated periodically and are subject to change. Price shown refers to single size, last updated sales price on 14.07.25. If you make a purchase using one of the links on this site, we may earn a small commission at no added expense to you.
FAQs
Is the TheraPur Glacier 3800 mattress good for hot sleepers?
Yes. ActiGel® foam and the ActiCool® knitted cover work together to regulate temperature and prevent overheating.
How supportive is the Glacier 3800 mattress?
The combination of pocket and micro springs provides total body support, adapting to your shape while minimising partner disturbance.
Does the mattress reduce motion transfer?
Yes. Individually wrapped pocket springs cushion movement, helping to reduce sleep disruption for couples.
Is this mattress suitable for allergy sufferers?
Yes. It features a fully hypoallergenic finish and breathable materials that promote a clean sleep environment.
Can the mattress be flipped?
No. This is a single-sided mattress designed to maintain comfort and performance without flipping.
