The Saddle Sandbag can be used anywhere weights are required; such as additional weights on bases, a counterweight for lighting and photography equipment, weight to secure tripods and equipment stands, and a vast variety of other uses. The bag is made from Cordura®, which is a strong type of woven nylon. You can adjust how heavy the weight is, but it can vary from 1lb when empty, up to 25lbs when filled up. The double zipper closure limits sand spillage. Each sandbag is sold individually and the sand is not included.