"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, Fits Canopy L x W ft. Alumi-Max 10 x 10, Material Thickness denier 500, Color White, Material Type Polyester w/center zipper. 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"