Long Lasting: Features a high density responsive memory foam to provide even support for all of your body's pressure points. Firmness: Has a medium firmness, perfect for people who like to sleep on their side. Memory Foam Mattress: Get a 12-inch orthopaedic reflex memory foam mattress. Mattress Depth: 12-inches thick with visco elastic memory foam, and high density reflex base foam to mould around the shape of your body. Cover Material: An antibacterial and hypoallergenic mattress with a premium soft knit zip cover for extra comfort. Sizes: Comes in a variety of sizes (see full details for dimensions). Reflex Memory Foam Mattress | Small | Living Social