Get the Lead Out! Water Weights are portable ballast bags that hold up to 50 pounds and fine tune your boat’s wake. With its “dip & zip” feature, just fill bag with lake water, use for ballast and dump when you’re done. No pumps needed! Water Weights are modular, manageable and weightless when not in use. Clumsy lead or sandbags continue to weigh you down and use extra fuel after you’re finished with your water sports. The large waterproof zipper makes them easy to fill and drain plug makes them easy to empty. Folds flat when not in use.