John Lewis Natural Collection British Wool Mattress Topper

For those who want to avoid synthetic foam, this John Lewis topper uses 100% British wool inside a 100% cotton cover, handcrafted in Lancashire. John Lewis describes the wool as temperature-regulating, which is why it is often chosen by people who find memory foam warm. At around £110 for a king (indicative) it is fairly priced for a natural product, with an elasticated fit for mattresses up to 36cm deep and a 2-year guarantee. It ranks fifth because a wool fleece adds a comfortable, breathable layer rather than the deep cushioning of foam or the responsive support of springs, and it needs more careful cleaning than a machine-washable fibre topper. Choose it over the foam picks specifically for natural materials and a breathable fill.