The Silentnight Self-Heating Mattress Topper features a unique heat-reflecting foil combined with a thermal lining and deeply filled quilted top layer to add up to 7.5 tons of extra warmth to your bed. The foil lining reflects body heat back to the sleeper and retains warmth, keeping your bed cozy and warm without the need for electricity. Not only does this topper help you save money on your heating bills, but it’s also deeply quilted and made with super soft fabric for added comfort. The elasticated straps make this topper easy to fit over your current mattress during the colder months. Silentnight is the UK’s most trusted sleep brand with over 75 years of experience in creating products for every sleeper.