New out of box, choice of size The cushion of a running shoe and the benefits of a minimalist shoe combine in this Altra™ Men's Instinct Running Shoe.• Editor's pick of Most Innovative from Competitor Magazine, 2011. - The first "fully cushioned, foot-shaped Zero Drop™ running shoe."• Zero Drop platform: built on a flat, 1-to-1 ration, for a barefoot feel. - Naturally aligns feet, back and body posture. - - No elevated heel: heel and forefoot are the same distance from the ground.