The Nike Air Relentless is a lightweight, performance training shoe for the female athlete training to dominate her sport. Synthetic leather and textile upper adds breathability and support. External heel counter extends to the upper, improving lateral stability. Visible maximum Air-Sole unit in the heel. Single-lasted Phylon forefoot improves flexibility and cushioning while offering lateral stability. Multidirectional solid rubber outsole offers durable performance and traction. Exposed flex grooves provide enhanced forefoot flexibility. Wt. 9.8 oz.