Orthopaedic mattress: Get a Ruby orthopaedic memory sprung mattress. Spring mattress: Features a 13.5 open coil bonnell spring which aims to relieve pressure points and promote good blood circulation. Allergy free: Hypoallergenic and deep micro quilted for extra comfort. Deep and soft: Eight inches deep with a memory foam layer which contours to your body's natural shape. Firm feel: Orthopaedic mattress with a medium/firm comfort rating - ideal for front or back sleepers. Six sizes: Choose from small single, single, small double, double, king or super king sizes. | Orthopaedic 8" Memory Sprung Mattress | Wowcher