Comfort: A layer of memory foam for enhanced comfort. Sizes: Available in 2ft 6″, 3ft, 4ft, 4ft 6″, 5ft or 6ft. Mattress: Get a brand new memory foam mattress. Memory foam: Aims to relieves pressure points across the body & promotes good blood circulation. Base: 13.5 gauge open coil bonnell spring base. Hygienic: Hypo-allergenic and dust mite resistant.