These weight bags are made of heavy duty Oxford cloth with PVC coating, waterproof, sturdy and durable, the interior with PVC coating and double stitching, can effectively prevent sand leakage. Each sandbag can hold up to 7-9kg. And it can be filled with anything, such as sand, gravel stones, etc. Use magic seals instead of zippers, easy to use and no need to worry about the zipper breaking. Weight bag suitable for most instant awnings and pop-up structures on the market, including any awning, tent or gazebo, patio, sports and backyard, caravan awning, instant awning, instant shelters, instant canopy. The weight bags for canopy legs are very sturdy and can help umbrellas, tents, awnings stay upright in strong winds. Suitable for all types of gazebo, tent, awning, carport, parasol, sunshade, etc. Weight bags are a must-have for markets, camping, celebrations, picnics, festivals, parties, barbecues, sporting events, the beach, and anywhere you need a canopy or tent.