The Nike Zoom Nucleus MC+ running shoe features a breathable upper with a very supportive overlay design and a secure midfoot saddle to help keep your foot in a neutral position. Zoom Air™ unit in heel and forefoot. Large dual-density post with TPU grid reinforcer. Decoupled Crash Pad helps reduce overpronation. Supportive shank, BRS 1000™ heel. Duralon™ and Waffle® Fill add cushioning, traction and great durability. Fitsole sockliner, flexible forefoot. Nike+ enabled. Wt. 13.6 oz.