Durable Material: Made of 420D waterproof material, with PVC coated Oxford cloth, the front is waterproof and rainproof, and the back is coated with silver sunscreen. Both waterproof and sunscreen, the material is very durable and can be used for outdoor camping such as tents, umbrellas, etc. Stable and Hook Design: With high sewing density, our sandbags have double-seam middle seams, which are more firm and wear-resistant. With hook design, it is convenient for you to carry the handle when you are on the move. Capacity: Each sand bag can hold 25 pounds of sand, whether it is a pop-up tent umbrella or a sun umbrella, it can be stable in strong winds. Easy to Assemble: Compared with other zipper designs, our sandbags are designed with upgraded Velcro, which is more convenient to use, you don't have to worry about zipper damage, and you don't need to spend too much time to assemble. Note: Although our sandbags are waterproof, they cannot be filled with water. But you can also use it to hold stones, water bottles, dirt, rocks, etc. Whether it's beach camping or other lawn outdoor camping, it's easy to find weights stuffed in sandbags. Specification Capacity: 25 lbs of sand Weight: 1000g Color: Black Material: 420D oxford fabric with PVC coating Package includes: 4pcs* fixed sandbags