Sidewalls for the Fast Shade Pop Up Tents and Pronto Pop Up Tents are attached to the tent with Velcro hook & loop, making installation and tear-down quick and easy. At each corner the sidewalls are equipped with zippers to enclose the space, and secure to the frame leg with wrap-around Velcro straps. Pop up / folding canopy sidewalls are created from the same material as the tent top, allowing them to be custom printed with graphics to match your tent.