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