Sand bags are an indispensible safety measure on any set to ensure that stands don't tip over or damage expensive equipment and cause injury, resulting in expensive downtime. Kupo sand bag features a saddlebag design that is ideally suited to drape over stand legs and boom arms. It ships empty so that you can fill it with your choice of material translating to much lower shipping costs. Made of sturdy 1,000D Cordura Nylon for long life and thick plastic internal liner bags help keep dust in and water out. It also comes with double velcro design ensuring no sand will leak out of the bags.