- Two layer pressure reduction materials. Top is 15mm 3D layer and lower part is 85mm CMHR foam - Double safety standard of pressure reduction - Castellated design cut surface to aid greater patient profiling, comfort and ventilation - 3D layer can be evenly pressure distribution, and with freely breath - Top layer can be dissipated air and moisture - 2-way stretch PU cover is waterproof and vapour permeable - 3 side zip for easy cover removal - Flame Standard: BS7177: 2008 medium hazard