Sizes: Single, small double, double and king size. Thickness: Approximately a 9-inch mattress. Details: Dust mite resistant and hypo-allergenic. Mattress: Get extra cosy with a memory foam mattress! Material: Features a layer of memory foam. Additional: 3.5 Gauge Open Coil Bonnell spring for extra support. Luxury Extra-thick Memory Foam Mattress | Living Social | Living Social