Modular LASER cut foam mattress 36 density high impact foam 757 Comfort Cover urethane coated double stretch and breathable Size 1980 x 880 x 160 mm Mattresses included here has a cross cut upper surface. This results in the mattress somewhat conforming to the shape and movement of the body. This can reduce friction and shear by allowing the surface to move with the user. A cross cut surface can also provide better ventilation for the skin as flat surfaced foam ca n act as an insulator and increase skin temperature.