Built For War : Carrywell sandbags are truly army grade. Our sand bags are assembled with a double stitched bottom and 850 denier fibers. Carrywell sand bags can be filled with gravel or sand up to 50lbs. The opening is 14 inches allowing for easy filling. You will receive 20 empty white sandbags in this pack. | UV Stabilizer : Our sandbags are manufactured with a UV Inhibitor that allows the sand bag to last 6 months under direct sunlight in hot, sunny environments such as the southeast and southwest. In cooler parts of the country, these flood barrier sand bags can last 6+ months depending on the intensity and time of exposure. | Toughest Material : Carrywell sandbags are made of 850 denier woven polypropylene with a double stitched bottom seam for extra strength. Tearproof, sturdy and built tough. | Flood Protection and More : Carrywell sandbags were designed to keep your home and business safe. Easy to fill and effective as barriers for floods during hurricanes and heavy rain storms. Whether you are landscaping, managing a construction site, storing dry materials, or anchoring canopies and umbrellas, Carrywell sand bags offer a wide range of uses. Convenient built-in tie strings give you total control over when and how you want to use these utility bags. | American Owned : Our mission is to help reduce American dependence on China. Carrywell is 100% American owned and headquartered in Miami, FL USA. We do not produce any items in China and our sandbags are 100% made in India.