- Builds fast-twitch muscle fiber in the lower leg
- Includes Training Manual and DVD/CD-ROM
- Sizes: M 8-10 1/2; L 11-14 1/2; XL 15-20
- For ages 12 and up or at least size 5 shoe
- Builds fast-twitch muscle fiber in the lower leg
- Includes Training Manual and DVD/CD-ROM
- Sizes: M 8-10 1/2; L 11-14 1/2; XL 15-20
- For ages 12 and up or at least size 5 shoe
