Sandless Sandbags are a lightweight, portable alternative to filling and transporting heavy sandbags. Each bag weighs less than 1 lb, making it easy to carry several at a time. The bags are pre-filled with a non-toxic absorbent material that expands on contact with fresh water, forming a gel that creates a barrier to block and divert water. Dry and store the bags for reuse. Absorbent Specialty Products LLC.