Perfect solo training - This new evolution football trainer is perfect for solo training such as football, volleyball and rugby. .Adjustable waistband - the waist strap is adjustable to fit waist sizes (83-100CM). Great football training aid for kids and adults.Adjustable stretch strap - 1.8m elastic strap stretches up to 5.5m. Perfect for changing the length of the ball and for adapting to different environments such as backyards.Flexible for different size balls, fits size 3, 4 and 5 balls. It can help develop skills such as ball control, passing, touch and reaction. . GET MULTI-ASPECT TRAINING - Shooting, passing, receiving, juggling, ball control, throw-ins, all of these training routines only require the solo kicking coach. .