1200 Pocket Springs Generous 5cm Layer of V60 memory foam 2.5cm layer of soft foam Tape edge for extra support Encapsulated mattress Memory Foam is a man made foam which has a high density and viscosity compared to other foams. Memory Foam has an open cell structure which allows it to change shape with heat and mould. This type of foam is typically heat sensitive, which means it reacts to heat making it softer and more pliable, so when someone lies on it their body warmth allows the Memory Foam to mould to their body shape.