Orthopaedic mattress: Get a reflex memory foam orthopaedic mattress. Forms to your shape: Designed to form to your natural body shape and support your body during sleep. Depth: Firm with a depth of 6" (approx). Sizes: Choice of six sizes (see below). Hypoallergenic: Hypoallergenic and anti dust mite. Get a great night's sleep: Feel the benefits almost immediately. Reflex Memory Foam Orthopaedic Mattress | Small | Living Social