DURABLE MATERIAL: Made of heavy duty 600D Oxford fabric for tear resistance and PVC coated inside for extra water resistance. 25-44 lb Sandbags - Each sandbag weighs about 25-30 lbs (11-14 kg) when fully filled with sand, soil and stones. It will stabilize any tent or folding umbrella. Filling is quick and easy: you can fill it with sand through the two openings at the top. Attaching to the gazebo legs with Velcro straps and two buckle straps prevents items from collapsing, and the buckle at the top allows you to better carry the heavy bags. Measuring 15 x 50 cm, the two-pocket tent weights make an ideal counterweight base for the canopy. Velcro fasteners replace zippers, which is more convenient. You no longer have to worry about the inconvenience of zippers. Versatility: Each weighted sandbag (with 15-50mm long legs) is ideal for camping tents, pop-up tents, trampolines, sports umbrellas, gazebo structures and cast iron tents. Package includes: 4 sandbags (other products such as