Browse our range of Sealy mattresses to find the size and style that suits your sleeping habits. Whether you're seeking the plush embrace of a pillow-top gel mattress or the contouring support of foam, our Sealy collection caters to a range of preferences. Gel mattresses use particles that help dissipate body heat, ensuring a cooler sleep surface throughout the night, whilst foam mattresses typically utilise various types, such as memory foam, without the addition of gel particles. The Sealy Posturepedic mattress line is renowned for providing exceptional support and comfort by using Sealy's unique Posturepedic technology to target the heaviest part of your body and provide reinforced support where you need it most. Discover the best Sealy mattress at John Lewis.