Cooling mattress toppers: which ones actually cool, and which just say so
A cooling topper is the cheapest thing you can try if you wake up hot, and the market knows it: there are hundreds, most of them memory foam with a cool-touch cover and a blue box. This guide is about which materials actually run cool, what a topper can fix, and when you are better off saving the money towards a mattress.
First, what a topper can and cannot do
A topper changes the top five centimetres. If the heat is coming from a memory foam mattress underneath, a breathable topper puts a cooler layer between you and it, and that works. If the heat is coming from a plastic-backed protector, a polyester duvet, a warm room or the person next to you, the topper will not touch it. Check those first; they are cheaper.
A topper does not fix support. If your mattress has dipped, a topper follows the dip.
The materials, honestly ranked
| Topper | Cool? | Feel | Rough price, double | Notes |
|---|---|---|---|---|
| Talalay latex, 5 cm | Yes, the coolest | Buoyant, springy | £150 to £300 | The best answer for hot sleepers. Heavy. Lasts ten years. |
| Wool, quilted | Yes | Soft, dry, traditional | £80 to £200 | Moves moisture; ideal for night sweats. Compresses over a year or two. |
| Dunlop latex | Yes | Firmer, denser than Talalay | £120 to £250 | Still cool; less bounce. |
| Graphite open-cell memory foam | Cooler than memory foam | Sink-in | £80 to £150 | The one memory foam that does something. Still warmer than latex. |
| Gel memory foam | Barely | Sink-in | £50 to £120 | Cool for the first half hour. The most sold and the least effective. |
| "Cooling" microfibre / hollowfibre | No | Soft, flat quickly | £25 to £60 | A cold-touch cover on a polyester pad. Feels cool to the hand, does nothing at 3 am. |
| Standard memory foam | No, the opposite | Sink-in | £40 to £100 | Adds a heat-holding layer. Avoid. |
If you sleep hot and already have a memory foam mattress, the best move is latex or wool on top of it, so the memory foam is doing the pressure relief and something breathable is doing the touching.
What to look for
- The material, by name, not "cooling". Latex (and which kind), wool, or graphite foam.
- Depth: 5 cm for latex or memory foam; 3 cm does not change much. Wool is quoted by weight instead, and heavier is better.
- A cover that breathes: Tencel, cotton or bamboo viscose. Not polyester, and not waterproof.
- Straps or a fitted skirt, or it will walk across the bed.
- Density, if it is foam: latex 65 kg/m³ and up, memory foam 50 and up.
When a topper is the wrong answer
- The mattress is more than seven years old or has a dip. Toppers do not fix support; see the six signs a mattress is done.
- The mattress is solid memory foam and you are very hot. A topper helps, but the block underneath still holds heat; a sprung mattress with latex on top is the real fix.
- You want to sleep cooler and softer and the mattress is firm. That works. You want cooler and firmer: a topper cannot firm a mattress up.
The order to do things in
- Swap the protector for a breathable one and the duvet for a lighter one. Often that is the whole answer.
- Add a latex or wool topper.
- If you are still hot after that, the mattress is the problem and the topper goes on the next one.
How we do it
Our own topper, The Soft Top, comes in Talalay latex as well as soft memory foam, in a Tencel cover with corner straps, and it is what we send first if a mattress feels too firm. For a hot sleeper buying a mattress rather than a topper, The Hot Flush has latex on top by design.
The short version
- Latex and wool run cool. Gel memory foam barely does. Microfibre "cooling" pads do not.
- Fix the protector and duvet first; they are often the heat.
- 5 cm, a breathable cover, straps.
- A topper changes the surface, not the support.
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