4pcs 600D weight sand bag, fitting for canopies, pop up tents and gazebos, perfect for enhancing stability and improving reinforcement in windy weather Made of durable 600D oxford fabric for tear resistance and bearing capacity improvement, with PVC coating for water resistance; 1pcs can hold about 22 Lbs dry sand in total Convenient Design - 4 self-adhesive straps on side for easy attaching to tent poles; 2 straps for convenient carrying and lifting up Portable & easy to use - Foldable & reusable, convenient to store and transport; Conveniently filling with sands on the spot when you go to beach and empty it directly when not use Recommendation - If the sand bag's weight is not enough, you can buy more to stack, or add water into a full sand bag