A mattress topper can provide extra comfort or warmth to your mattress. You can choose from quilted, memory foam, duck down and feather, goose down and feather, siliconised, heated and microfibre. Mattress toppers come in standard bed sizes but it is best to check the dimensions of your mattress as there is a small double and super kingsize. Memory foam is the most popular option and is not always the cheapest. However, this site shows discounted prices from retailers such as John Lewis, Argos, Heal’s, Tesco and Marks and Spencer making most mattress toppers affordable.