Memory foam: The mattress is a coil sprung, topped with a layer of luxurious memory foam. Hypoallergenic: With an anti-dust mite, hypoallergenic design which is great for allergies. Mattress: Get a sleep easy memory foam mattress. Sizes: Choose from a small single, single, small double, double, king or super king. Comfortable: Have a restful sleep every night with the soft, comfortable feel! Depth: 20cm.