Convertible Crawl Box Grab Bars Accessories Includes:Back Shell Back Shell Hardware Hip Kits Includes:Back Shell Back Shell Hardware Back Cane Hardware Cover Foam Pad Air Insert Lateral Air Inserts Foam Insert Dual Wrench Lumbar Support Pad (select models) Repair Kit Hand Pump Product Registration Card Quick Set Up Guide and Operation Manual * Construction: Back Shell: Aluminum Back Shell Hardware: Zytel© with an aluminum Sliding Height Adjustment Bar Back Cane Hardware: Bracket and pins are aluminum * Pivoting Cane Band and Adjustment Cylinder are steel * Cover: Front side is 100% polyester * 8 Alternating Pressure Mattress With Low Air Loss 2 in 1 product converts from a 2 foot by 8 foot folding mat to a 2 foot cube * Use to develop gross motor skills *