Jumpsoles are the world's most popular tool for increasing your vertical jump. Jumpsoles are plyometric platforms that attach to your shoes. Jumpsoles focus your body weight onto your calves and train you to spring off the balls of your feet like a powerful cat. By doing the special plyometric exercises in the video you develop fast twitch muscle fibers in your legs for explosive leaping.Used by slam dunk contest winners and top pro & college teams. Received on the exact date promised! Arrived today undamaged and as advertised no problem found. Coin in very worn condition. The product was received as specified. The item "JUMPSOLES Plyometric Training Platforms MEDIUM Mens 8-10-1/2 NEW" is in sale since Thursday, December 17, 2020. This item is in the category "Sporting Goods\Team Sports\Basketball\Training Aids". The seller is "nowstore" and is located in Redwood City, California. This item can be shipped to United States.