EZ Stand & Go Exercise Mats * Aluminum casted back release MSHQ 1594XL * Aluminum casted back release hinge allows back to fold down for easy storage and transport * Standard rear wheel locks * Overall width w 17 seat: 20 (open) 9 (closed) * Overall width w 19 seat: 22 (open) 9 (closed) * Overall height: 39 Bugstop Seal Tape Closure * Waterproof top and sides (to zipper) * 100% Stretch polyester knit sides below zipper and on bottom * Stretch to fit mattresses up to 15 deep * Dust allergen proof and fire retardant * Self locking rust proof polyester zippers * Case of 6 Stand safely from any couch chair or recliner * 2 support handles for maximum leverage * Ergonomic handles * Easily adjusts to fit any couch or recliner * Installs in minutes without tools *