The Hayabusa Double End Bag is the perfect tool for developing core boxing skills, from timing and accuracy to speed and endurance. Take your training to another level with shock cords that rebound rapidly to challenge your hand-eye coordination and keep your reflexes sharp. Equipped with a perfect density ball and heavy duty braided cords to make setup and take down quick and easy in any training space. Features: Perfect density rebound ball delivers excellent feedback with a satisfying pop on impact, Heavy duty braided nylon shock cord rebounds ultra quick for high speed training, Ultra tough exterior and non-tear rubber bladder absorbs years of repeated punishment, Perfect size and shape rebound ball with striking targets for precision training, Air pump and stowaway needle for quick assembly and efficient storage