BLUE CHIP GEL-PRO OVERLAYS & MATTRESS REPLACEMENTS - Overlay Mattress, 4", Fits Invacare 42" Bariatric Bed, 400 lb Capacity | Quantity - 1x EAOffers maximum protection to guard against the incidence of pressure sores. Incorporate the best features and benefits of gel and foam. Our viscous gel, migrates through sectioned bladders to provide proper immersion and envelopment of the bony prominences with over 80% surface coverage. Sculptured low profile, resilient foam surrounds the gel to provide the proper combination for optimum pressure redistribution. A high density foam base supports the