The Pop-Up Canopy Anchor Bag - 4 Pack is the ultimate easy-to-fill, ready-to-use temporary anchor bag that can be used with any pop-up canopy product on hard or soft surfaces. It fits both straight leg and slant leg frames. Constructed of ultra durable polyester, the bags have sewn in webbing loops for easy slide-through leg connection. The innovative dual cylinder design wraps around canopy or shelter legs with heavy duty hook and loop fastener strips and on top of the bags are industrial grade zippers to allow wide open access for easy filling. Use in conjunction with spike anchor tabs for additional temporary anchoring security. The anchor bags hold up to 30 lbs. of sand or other filler.