Nike Zoom Javelin Elite 3 Track & Field Throwing Spikes Size 12Spikes Not Included High density foam helps dampen impact and transfer momentum while you throw. A full length Pebax plate helps create ground contact with minimal flex at foot plant. Reduced height keeps you closer to the ground, while a second velcro strap locks you in and helps prevent your foot from sliding. Midsole has a slight negative heel to toe drop that puts the heel lower than the forefoot, giving you an optimal launch angle at foot plant.