Portabrace Sand Bags are carefully designed and crafted using the same production process and materials as our famous camera cases. The Sand Bags are constructed using heavy-duty, 1000-denier Cordura fabric and durable nylon webbing. Double-stitched seams provide extra strength and lasting value. The interior sand pouches are made of a unique, semi-flexible material that prevents tears and sand leakage. There's a built-in nylon carrying handle as well as a large, solid-steel hook and ring that allows you to wrap the Sand Bag securely around c-stand legs, tripod legs, clip it to equipment cases, or strap it to light stands.