Easily attach walls and ends to any of our canopies for added protection from rain or UV rays. 10-ft. x 20-ft. and 10-ft. x 27-ft. canopy kits include two side walls, one end wall and one zippered end wall. Kits for 18-ft. x 20-ft. and 18-ft. x 27-ft. canopies include two side walls and two zippered end walls. Walls attach to one another with hook-and-loop tabs, ensuring complete enclosure, even at the corners.