"Add one or more polyester fabric walls to your ShelterLogic Alumi-Max 10ft. x 10ft. pop-up canopy Item# 24897, sold separately for wind protection or to completely enclose canopy. Sturdy zippered side panel zips up and down to allow for entry or to increase airflow. Commercial-grade wall delivers all-day shade or wind protection. Built to fit premium Alumi-Max brushed aluminum pop-ups. Zippered Door Yes, Windows No, Fastener Type Hook/loop, Material Type Polyester w/center zipper, Fits Canopy L x W ft. Alumi-Max 10 x 10, Material Thickness denier 500, Color White. Made of durable 500 denier waterproof polyester fabric Side panel with center zipper zips up and down to allow for entry or to increase airflow Has double-stitched, sealed seams UV guard and added fade blockers 50+ UPF UV protection blocks up to 98 of harmful UVA and UVB rays CPAI-84 fire-retardant fabric Panels neatly attach to frame legs with sewn-in hook-and-loop fasteners"