The 4pcs-pack weight bag helps stabilize any type of tent or marquee and each bag can hold 25-30 pounds. Made with heavy duty 210D Oxford material and waterproof PVC coating, very strong and durable. Perfect size and double pocket design provides a perfect weighted base for your Canopy. Use Velcro seals instead of zippers, easy to use and dont worry the zipper will be broken . Please note *SAND NOT INCLUDED* Perfect for all multi-purpose uses: It can be used in a patio, sandy beach, lawn, and any other place that needs stability. Gives you a better relaxing vacation. Unique Velcro Straps Design: With the sealable Velcro straps, it is very convenient and quick to seal the weight bag. No problem in your indoor or outdoor use. Stand Stable: These heavy-duty weight bags are a quick and easy way to protect your tent or awning. Each bag can be filled with sand, gravel, dirt or even water bottles Each sand weight bag can hold up to 35 lbs of sand, rock, dirt and more. 210D PVC Coated Double Closure Polyester: Unique design flap closure system, easy to fill and release, never leak sand. Made of 210D PVC reinforced polyester for a high quality, waterproof experience. Super easy to carry: Each sand weight bag can be rolled up to store. It doesnt need too much space. Moreover, it can be in good condition in next use.