Jumpsoles v5.0 Jump Sole Increase your Vertical Leap! Size medium- men's 8-10.5. Complete in box with training manual and training DVD. The worlds best jump and speed training system. Catcher 40 yard dash time by point two seconds adds 5 to 10 inches to your vertical jump.
Jumpsoles use the principle of plyometrics to add explosive energy to your jumping and sprinting. Just strap jump soles over your shoes and follow the training manual. When you take jump souls off, you'll feel the amazing spring in your legs.