Increase vertical jump, improve leg strength,leg explosive power ,agility,running speed, flexibility, balance,and endurance
The adjustable range of the waistband is from 27.5 inches to 38.5 inches.THE WAISTBELT OF XL SET IS 44 INCHES.If you are a larger person,We provide customized services，Please contact us and let us know the size of your waist and ankle .
This product can be used for basketball, volleyball and football sports training and squat training
100% SATISFACTION GUARANTEED - INNSTAR jump trainer come with a 100% satisfaction guarantee, and if they don't work out for you for any reason then contact us for your full money back. We know you will love them! To enjoy your premium jump trainer , click 'Add to Cart' now!