Impact is absorbed into the water bag which is significantly easier on joints and hands The Ringside Tsunami Water Heavy Bag helps to improve punching power, agility, flexibility and accuracy The durable even-walled rubber has a unique shell design and water filling provides a life-like feel of the human body Built to last for indoor or outdoor use in your commercial or home gyms Arrives unfilled with a Ringside logo sticker to attach and ready to hang with the included steel chain