The Adidas Super Speed Striking Bag is designed and crafted to develop your speed, hand-eye coordination, power and timing with the most durable and fastest speed bag in the gym. The premium design optimizes speed and balance for rapid, accurate rebounds, allowing you to develop your combinations and aerobic capacity. Heavy duty performance rubber bladder included for ultimate durability and fast rebounds. Perfectly balanced for an accurate, responsive feel. Encourages maximum speed, coordination, and focus. Ideal for all skill levels and ages.