Depth: Sink in to a great night's sleep with a mattress that is 9-10 inches deep with a top layer of memory foam. Memory foam mattress: Get a grey Cool Blue memory foam mattress. Size: Choose from six sizes (see full details and prices below). Comfort: Support your sleep with medium - firm comfort, perfect for side or front sleepers. Hypoallergenic: Hypoallergenic filling which is ideal for allergy sufferers. Design:This mattress features a 13.5" open coil bonnell spring for a longer life. Cool Blue Memory Foam Mattress | Living Social | Living Social