Filling the water bags can stabilize your canopy tent, similar to using sandbags. Specially designed straps ensure the weight bags stay securely attached to your instant canopy or pop-up shelter's legs or upper trusses. Capacity: This set of four water weight bags can hold up to 10 liters of water. The weight bags can be folded after emptying for easy storage, saving 90% more space. When folded, the size is only 6 x 6 x 2 inches. Material: Made of strong, waterproof PVC material. They are user-friendly with a grip handle and a screw-cap top. Velcros, hooks, and straps on each weight bag allow you to easily wrap them around the canopy legs, helping the canopy withstand strong winds and other weather elements. Size: 8.2 inches wide x 13 inches high. Suitable for legs ranging from 15mm to 50mm in size. You can adjust them up and down as needed. Suitable For: Various sizes of pop-up canopies, beach canopies, gazebos, carports, camping canopies, and more.