The repeated, jarring impacts from punching and kicking a heavy bag can be painful, sometimes even damaging. The Hydrocore from Century solves this problem with its unique water-filled interior. The liquid core not only absorbs and reduces those jarring impacts, but also provides the user with the satisfying feel of hitting a real opponent. Designed for safety, the Hydrocore also offers three inches of polyurethane foam padding surrounded by a durable coated polyester shell. If you are interested in a safe, fun heavy bag workout, the Hydrocore is perfect for you.