The CAP Barbell Soft 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. 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. The soft kettlebells will not damage your floor or equipment when dropped. Ideal for indoor and outdoor use.