Start a boxing journey with our 21" water heavy bag!By utilizing the power of water, this aqua training bag provides you with a comfortable boxing experience. The unique teardrop shape with high quality materials aims to accompany you for many years. Besides, you will not get injured thanks to the high-rebound surface and water filling. The ergonomic design is friendly for your hands, wrist, joints and shoulders. Additionally, the equipped adjustable hanging chain goes well with the boxing stand, wall and ceiling, permitting you to practice boxing at home, gym or outdoors. When not in service, the water in this heavy punching bag can be drained out for easy storage.