HullaBalloo Sales Inflatable Water Bags can safely anchor or weigh down inflatables, bounce houses, and or inflatable water slides. Use the Water Bags for multi-purposes like anchoring down pop up tents. Inflatable water bags can be used indoors or outdoors. Made from 18-ounce vinyl material and are hot welded for durability. You can connect multiple bags using the ring at the base of the bag. The bags are hassle-free, use the handles for easy carry. You can fill the bags up on-site and empty them before transporting for more efficient and easy transportation. Note: Water Bag does not come already filled with water.