Zero Drop™ platforms (0mm heel-to-toe drop) place heel and forefoot the same distance from the ground for natural alignment and low-impact landing Vibram® Megagrip™ rubber outsoles sculpted in the Altra TrailClaw™ pattern provide secure traction on varied terrain FootShape™ toe boxes allow toes to splay for natural foot positioning and comfort InnerFlex™ midsoles are more flexible and responsive than the previous version; 5mm contoured footbeds add cushioning Updated upper fabric pattern offers enhanced durability Built-in GaiterTrap™ secures your gaiters (not included) to your trail shoes to keep out dirt and debris 33mm stack height provides ample cushion for long runs Condition: Worn on 5-6 trail runs, and just a bit too short for me. Gently used. Purchased from REI in 2020. Please see pictures for condition, and feel free to ask questions.