HPI Solar Blanket Winter Cover for Reel Up To 24-Feet Wide The solar roller cover eliminates the need to drag your cover indoors for the winter. Made from high quality woven polyethlene it will protect your reel and solar cover from the harsh elements of winter and add years to the life of your cover. It includes heav-duty Velcro closure and an end draw string for a secure fit. Fits reels up to 24' wide.