Available 
Hypnos Wheatley Supreme Wool Mattress
from £2,179-£3,029.
£2,179-£3,029
Sizes tracked: Small Double, Double, King Size, Super King
Sleep guide
How to choose a mattress if you overheat at night
If you wake up hot, start by comparing mattress materials and construction before narrowing the choice by firmness, depth, price and comfort trial.
Sleep Savvy may earn a commission if you buy through links on this site.
Last verified: 2026-08-28
Why some mattresses feel hotter than others
When a mattress feels warm, the main clue is usually how much air can move through its layers rather than firmness alone. Dense foam builds can feel more enclosed, while pocket springs and coil-based constructions are commonly used because they leave more space for airflow. That makes a broad, lower-priced pocket sprung option like the Bodyshape Cooler 2000 Pocket Mattress (£356-£618) worth comparing alongside more premium natural models such as the Hypnos Wheatley Supreme Wool Mattress (£2,179-£3,029) and the Hypnos Witney Latex Supreme Mattress (£1,269-£2,099).
Mattress materials that may help with cooling
For hot sleepers, the most relevant material families in this shortlist are wool-rich natural, latex and pocket sprung. Wool is commonly presented as breathable and moisture-wicking, which is why the Hypnos Wheatley Supreme Wool Mattress and the Hypnos Witney Latex Supreme Mattress stand out on a temperature-comfort shortlist, while the Bodyshape Cooler 2000 Pocket Mattress leans on pocket springs and soft white fibres. Latex is often positioned as a cooler-feeling material family than dense all-foam constructions, but the overall build still matters more than the label on its own.
Other buying factors that affect sleep temperature
Firmness can change how enclosed or supported a mattress feels, but it does not tell the whole cooling story. In this shortlist, the Bodyshape Cooler 2000 Pocket Mattress is labeled Firm, while both Hypnos examples are Medium, so it is a useful reminder not to assume firmer automatically means cooler. Sleeping position, room temperature and bedding also matter: a side sleeper may want a different feel from a back sleeper, and a lighter duvet can change how warm the whole setup feels more than the mattress alone.
How to compare mattresses on a product page
Start with depth, size availability and base fit before comparing comfort wording. Mattress depth can affect whether your sheets, topper and bed frame work properly, and all three example pages flag depth as a practical fit check as well as a comfort detail. Then compare the live size list, the latest price, delivery to your postcode, setup or removal options if offered, guarantee length and the 100-night comfort trial. That way you are judging the Hypnos and Bodyshape options on fit and value, not just on cooling language.
What the wider research shows
The clearest takeaway is that hotter sleepers should prioritise breathable materials and airflow-focused construction before they fixate on firmness. Natural fibres such as wool are repeatedly described as breathable and temperature-regulating, springs and coils are often linked with better airflow through the mattress, and latex is commonly positioned as a cooler-feeling family than dense foam. The caution is that public review volume for these examples is very thin, so the visible star ratings should be treated as a light confidence signal rather than a strong verdict. For practical comparison, the shortlist also spans a wide price band from £356 to £2,179, so shoppers should expect different specs, finishes and brand positioning rather than a like-for-like contest.
How to turn the advice into a shortlist
If budget matters most, the Bodyshape Cooler 2000 Pocket Mattress is the entry point at £356-£618, but it should be judged on its pocket spring build and medium-term comfort expectations rather than assumed to match the premium Hypnos models. If you want a natural-material story, the Hypnos Wheatley Supreme Wool Mattress and Hypnos Witney Latex Supreme Mattress both sit much higher on price, but they may suit shoppers who prefer wool-rich or latex-led comfort layers and are willing to pay for that construction. All three show a 100-night comfort trial, free delivery to most locations and a guarantee period, which helps with comfort preference but does not prove cooling performance. Because review counts are very thin, use the visible ratings as a starting point, then verify the latest price, guarantee length, size range and mattress depth on the live retailer page before deciding.
Mattresses to use as comparison examples
Available 
Bodyshape Cooler 2000 Pocket Mattress
from £356-£618.
£356-£618
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Hypnos Witney Latex Supreme Mattress
from £1,269-£2,099.
£1,269-£2,099
Sizes tracked: Single, Double, King Size, Super King
Retailer details used
Last checked 2026-08-28. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.
- Hypnos Wheatley Supreme Wool Mattress | MattressOnlineproduct-page evidence for Hypnos Wheatley Supreme Wool Mattress
- Bodyshape Cooler 2000 Pocket Mattress | MattressOnlineproduct-page evidence for Bodyshape Cooler 2000 Pocket Mattress
- Hypnos Witney Latex Supreme Mattress | MattressOnlineproduct-page evidence for Hypnos Witney Latex Supreme Mattress
- How We Determine Temperature Control RatingsGeneral evidence on temperature control, heat retention, and who should care about sleeping hot.
- Best Cooling Mattress for Hot Sleepers of 2026: Tested by ExpertsHot-sleeper guidance and cooling-feature examples such as breathable covers, coils, latex, and hybrids.
- How to Choose a Mattress: Finding Your Perfect MatchGeneral mattress-selection guidance and material/firmness context.
Helpful next reads
Use these related mattresses guides and reviews to turn the advice into a practical shortlist.
Firmness questions
Is memory foam always too hot?
Not always, but dense foam layers are often the first thing hot sleepers compare against more breathable constructions. If overheating is your main concern, a pocket sprung, latex or wool-rich mattress may be a better place to start than an all-foam build, depending on the rest of the specification.
Do firmer mattresses sleep cooler?
Sometimes a firmer mattress can feel less enveloping, but firmness is not the same thing as temperature comfort. In this shortlist, the Firm Bodyshape Cooler 2000 Pocket Mattress sits alongside Medium Hypnos models, which shows why material build, airflow and bedding should be checked as well.
What mattress materials are best for hot sleepers?
A sensible starting point is breathable materials and airflow-friendly construction: wool-rich natural mattresses, latex and pocket sprung designs are all commonly shortlisted. The best match still depends on your size, base compatibility, budget and whether you prefer a firmer or medium feel.
Does a 100-night trial tell you if a mattress sleeps cool?
It helps you judge comfort preference at home, but it does not prove cooling performance. The trial is useful for checking whether the feel, firmness and overall setup suit you, while the material family, depth and bedding still need to be checked separately.
Why does mattress depth matter for fit and comfort?
Depth affects how the mattress works with your sheets, topper and bed frame, so it is more than a cosmetic detail. If a mattress is deeper than your current setup expects, the fit can change, so it is worth checking the live product page before buying.