1. Made of durable nylon material, ideal for a variety of filling materials such as sand, gravel or rock. 2. Each sandbag has a nominal weight of 9 kg, is robust and the filling material does not escape easily. 3. Designed for use in photography as well as for tensioning and weighting, with excellent stability 4. Package includes 4 empty sandbags (without filler), which are easy to clean and designed to last. 5. Enjoy a smooth and worry-free return service within one month. If you have any questions, please feel free to contact us, we are here for you.