Use the adjustable strap to suspend these bags from rigging, booms, and other equipment that you need to balance. You can attach them anywhere: unhook the strap from the bag, wrap it around your equipment, then clip it back onto the bag. Their bottom is flat, so you can also set these bags upright to weigh down equipment. Made from Cordura nylon, the cover is dustproof, waterproof, and puncture resistant—you can use these bags indoors or outdoors. Double-stitched seams form a tight seal to keep the sand from leaking out.