As temperatures climb, getting a good night's sleep can become a challenge. A cooling mattress topper may offer some relief, with designs using breathable materials to prevent heat and moisture build-up, or cool-touch fabrics that create a refreshing sensation on contact, according to Hannah Shore, sleep scientist at Mattress Online.
One topper tested during an especially sultry spell in mid-June proved effective, with the tester still managing to sleep well unhampered by the heat. The brand claims its cooling effect comes from bamboo and charcoal infused into its memory foam. While that specific claim could not be confirmed, the topper was found to be cooling in practice.
It did not trap heat or become especially clammy, which was attributed to good airflow and moisture-wicking materials. The topper expanded enough to be ready to use after two hours, although full expansion may take up to 48 hours. The foam was described as soft and squishy, offering a comfortable layer of pressure relief.
The testing covered a range of toppers, from premium designs around £250 to wallet-friendly options under £50, and was carried out during both mild spring weather and last year's intense summer heatwaves. While a cooling topper will not turn a bed into an ice-cold surface, the right choice can help take the edge off warm nights.
