Training Content: After each swing/kick, the bungee cord will guide the ball back, saving time to retrieve the ball and improving ball control ability. ADJUSTABLE: The bungee cord is 6.5 feet long and can be stretched to 21 feet to change the length of the ball and adapt to different environments, such as the backyard. ALL LEVELS: Adjustable length neoprene bag to fit standard volleyball or beach volleyball; it also fits size 3, 4, and 5 soccer and football balls. Made of breathable neoprene and nylon straps, this soccer training shoe is more suitable for long-term use.