Durable Material: Canopy weights crafted from high-strength 600D Oxford fabric with tear resistance and a PVC coating inside for added water resistance. Heavy-Duty Sandbags: Each sandbag, when fully filled with sand, dirt, or rocks, weighs approximately 11 to 14 kg (24-31 lbs). They effectively stabilize any free-standing tent or folding canopy umbrella. Quick & Easy Filling: We provide a small shovel to quickly and easily fill the two top openings with sand. Velcro straps and two loops secure it to the black car leg, preventing collapse. The top ring aids in carrying heavy bags. Ideal Size: Measuring 15 x 48.5 cm (approx. 6 x 19 inches), these double-pocket tent weights offer an ideal weight base for canopies. The Velcro closure is more practical than a zipper, eliminating zipper-related issues. Wide Application: Each sewn sandbag (leg length 15mm to 50mm) is perfectly suited for camping awnings, pop-up tents, trampolines, sports umbrellas, trellis structures, and flow tents.