The Nike Air Max 90 TR II is a medium-to-high intensity training shoe for the athlete who participates in multiple types of gym activities. Synthetic leather and mesh upper with supportive webbing underlays and midfoot overlay enhance midfoot support. Visible maximum Air-Sole unit in the heel. External heel counter locks the foot down. Double-lasted Phylon forefoot with Poron insert. Non-marking rubber outsole with flex grooves enhances forefoot flexibility. Wt. 11.0 oz.