Durable 8 foot water bag made with 16 gauge vinyl. These water bags are made with high quality, high performance and come equipped with no leak valves so they will last more than one closing season. It is recommended that these water bags be filled about 1/2 to 3/4 full. To prevent the water from freezing in the bags over the cold winter months, simply add some pool or RV antifreeze in the bag.