Brand new, no box, sample shoes. Price is firm! No trades. Breathable engineered mesh upper with knit jacquard through the heel and midfoot for structure and stability. Zoom Air units for responsive cushioning that returns energy with every step, propelling you to a faster run. Cushlon crash rail on the lateral side of the outsole absorbs the force of impact and helps guide your foot through a smooth, natural transition from heelstrike to toe-off.