Dam Bags are sandless sandbags that are light, easy to deploy and 100% biodegradable. Sandless sandbags are a relatively new type of sandbag which is changing the world of flood protection for home owners, business owners, government agencies and emergency service agencies. Dam Bags use a polymer to inflate the bags from 14.5 ounces to a full 35 pounds in only 3-5 minutes. A box of 24 sandbags only weighs 22 pounds as opposed to hundreds of pounds with traditional, filled sandbags.