The Nike Shox Experience running shoe from the Nike running shoe company is designed for runners with normal to high arches which don’t overpronate. The Shox is lined with air filled pillars which replace the rubber heel columns that Nike used to use. This design results in a comfortable shoe with soft heel cushioning but which still has an overall firmness to it. This is created by the addition of a plastic footbridge which is used to make the heel to toe transition in the gait cycle more gradual and controlled rather than abrupt which is sometimes the case in other running shoes.