【First Zipper Design】- The first in its category with zipper closure, providing more convenience and durability than traditional hook-and-loop fasteners. 【Drop-Tested Sandbags】- Our canopy sandbags are the only products on the market that have passed a high-impact drop test, withstanding the force of a 30-pound weight dropped from a height of 9.8ft(3m). This proves our commiment to superior quality. Watch our video to see the full test in action. 【Durable Materials】- We use high-density 600D Oxford Fabric with PVC coating to prevent sand leakage and weathering. Additionally, we choose 3-ply reinforced threads from well-known brands to provide superior stitching strength, ensuring the sand bags' durability. 【Capacity and Dimensions】- Each bag can hold up to 30 pounds of dry sand, and it can also be filled with wet sand, soil, small gravel, and other materials. A set of 4 fully filled bags provides enough weight to stabilize a 10x10-foot tent, even in strong winds exceeding 40 km/h. The product dimensions are 19 inches in height, with a circular base diameter of 6 inches. The side Velcro straps are designed to fit canopy tent legs with a diameter of up to 2"(5cm). 【NOTES】- SAND NOT INCLUDED. Additionally, these weight bags cannot be filled with water directly. Zipper top sand bags for canopy legs, gazebo legs, tent legs, sandbags for weights.