Our water filled kettlebell has a maximum weight of 15lbs. Water weights bags are made of durable and soft construction. Lightweight, suitable for travel and home storage after emptying. Our sandbag alternative is a collapsible hydration kettlebell that challenges your entire body anytime, anywhere, without the bulky and expensive iron weights. Kettlebells for strength training - adjustable weight by removing water, protects the floor when landing. Workout water bags effectively avoid injuries caused by collisions. Water filled kettlebells for versatile training - Skip the gym and work out in the comfort, safety and privacy of your home. It's perfect for athletes, fitness enthusiasts, and beginners.