The CAP Barbell Soft Kettlebell is an effective tool for improving your strength and endurance. Working out with kettlebells will sculpt and tone the entire body because lifting and controlling a kettlebell forces the entire body, and specifically the core, to contract as a group, building both strength and stability at the same time. Kettlebell workouts engage multiple muscle groups at once. They are a great option for getting a whole body workout in a short time. These kettlebells are covered in a soft neoprene fabric with a wide, soft grip handle and filled with iron sand making them extremely comfortable to handle. They will not damage your floor or equipment when dropped. Ideal for indoor and outdoor use. This is a patented product.