SKLZ HOPZ Vertical Leap Trainer: Features: * Creates explosive vertical leap in your players * Adjustable belt on SKLZ HOPZ trainer fits most waist sizes * Ankle straps with shoe harness create a secure fit * Recommended height to use vertical trainer: 5-feet 4-inches to 6-feet 2-inches About SKLZ As an innovator in athletic training, SKLZ is the flagship brand of Pro Performance, a premier player in the development and marketing of training aids and equipment for basketball, football, soccer, baseball, softball, and golf. With products designed for players of all ages and skill levels, SKLZ focuses on finding innovative products and methods that help maximize athletic potential and meet goals. Located in San Diego, California, SKLZ and Pro Performance operate internationally, with their products found at major sporting goods retailers, specialty shops, and training centers everywhere. * Elastic resistance bands create explosive leaps * Training band dimensions: 24L x 16W x 3H in * Adjustable resistance with a maximum of 40 lbs. * Bands attach easily with ankle straps and belt rings * Helps develop explosive lower body power