Masterpure is a memory foam mattress to be used on two sides. The memory foam, softened by the particular detailing of the two overlapping layers, is juxtaposed against an elastic and firmer layer of Evocell foam at the centre of the mattress. The result is a mattress with a medium firmness that feels very comfortable on the surface thanks to the use of memory foam. Masterpure is a Class 1 Medical Device.