Invacare's Group I Therapeutic Support Surfaces are designed to aid in the prevention and treatment of pressure ulcers. Three types of modalities allow you to choose the right product for the individual user. Product types include alternating pressure overlays, gel overlays, and foam mattress replacements. All of these products are simple to use and easy to maintain. Features Several large 2 thick gel bladders inside polyurethane foam provide maximum patient comfort. Gel stays under patient and will not migrate from point of pressure. Reversible for increased service life Durable base material with strong elastic corner straps reduce overlay movement Vapor permeable water-resistant cover with low friction and shear. Does not contain latex Specifications Product Weight 55 lbs. Overall Length 77 Overall Width 36 Overall Height 3. 5 Warranty 6 months Product Weight Capacity 250 lbs NOTE All specifications, prices, and product configurations are subject to change without notification. Accessories and other products shown in the photographs are not necessarily included in the base price of overlay. 1 Each / Each