reduces pressure & sheer w//Pressure-CheckTM foam. Its individual zones distribute weight relieving interface pressure. Ultra-soft heel zone lowers pressure beneath heels. 7-year, non-prorated replacement guarantee on foam components. Prevents “roll-off” Choose wipe-clean, Low-Shear II or durable nylon. Specify cover when ordering. #558051-36x76 #558052-80x36 #558053-84x36 Latex Free UNSPSC# 42191810