Get a grey Cool Blue memory foam mattress. Mattress is 9-10 inches deep with a top layer of memory foam. Medium - firm comfort, perfect for side or front sleepers. Choose from six sizes (see full details and prices below). Hypoallergenic filling which is ideal for allergy sufferers. 13.5 open coil bonnell spring for a longer life. | Grey Cool Blue Memory Foam Mattress | Wowcher