Vertical High Jump Trainer-Black to improve the leg strength to do anything you can do to achieve the squat action or participate in any sport, for enhancing the jump, speed and strength are very helpful with rubber foot ring/ring is the adjustable wrist, snap Department can add more elastic rope to increase resistance.
What's in the box:
1 X Vertical High Jump Trainer - Black
1 X Belt
2 X Bands
1 X Waistband Ankle