Propriocepter Plugs
Attaches to the V4.0 Jumpsoles (Item MP-JS) to create the most advanced leg strength trainers available. Develops balance and agility plus, prevents injury.  Proprioception is the latest development in scientific leg strength training. Controlled chaos and imbalance is created by the Propriocepter Plugs, forcing the brain to fire impulses to muscle fibers at over 1000 times per second.