These Canopy Weight Bags adopt top heavy duty 800D oxford fabric with PVC Coating, waterproof sturdy and durable, the inner with PVC coating and double-stitched, can effectively prevent sand leakage. Each sand bag can hold up to 20-25 lbs. And it can be filled with anything, such as sand, gravel rocks, and so on. Use magic tape seals instead of zippers, easy to use and no need to worry the zipper will broken. Weight Bag Suitable for Most instant canopy and pop-up structures in the market include any Canopy, Tent or Gazebo,Patio,Sports and Backyard, Caravan canopy, Instant Canopy, Instant Shelters, Impact Instant Canopies. The canopy leg weight bags are very sturdy and can help umbrellas,tent,canopy stay up in strong winds. Suitable for any kinds of gazebo, tent, canopy, carport, beach umbrella, sun shelters, etc. The Weight Bags are must have for markets, camping, celebrations, tailgating, picnics, festivals, parties, barbecues, sports events, the beach, and anywhere else you'd need a canopy or tent.