Universal Fit: Weight bag (4 pieces) for any awning or tent (fits leg size from 15mm to 50mm), 25-30 lbs weight on each corner. Unique Design: Use Velcro seals instead of zippers, and there are two Velcro straps to attach it to your awning legs, and a strap at the top for carrying. Waterproof and Durable: High strength waterproof Oxford fabric with PVC, durable and can be used in all types of weather and seasons. Easy to Use: Filled with sand, rocks, snow or any other available material nearby. Emptying the bags was as easy as filling them, and not having to carry the extra weight of filler sand was nice for reducing the overall weight. It's easy to use and carry: First, the top folds twice to be Velcroed into place, like a brown paper sandwich bag your parents gave you to take to school. Second, you fold the two lobes of the bag toward each other, compacting it into a solid piece. Next, there's a Velcro strap that wraps horizontally around the center of that piece. Finally, the Velcro is tightened, and the strap running down the back becomes a handle for carrying the bags. Please don't hesitate to contact us if you have any questions or concerns before or after your purchase. We are committed to your 100% satisfaction. Please allow slight manual measurement deviations from the data.