Engineered for fast, competitive mountain running, these women's outdoor shoes are built with a lightweight boost(TM) midsole that provides endless energy return. PRO MODERATOR(TM) support stabilizes your stride, and a rugged Continental(TM) Rubber outsole penetrates the ground and holds onto slick, slippery surfaces. Features: - Boost(TM)'s energy-returning properties keep every step charged with an endless supply of light, fast energy - PRO-MODERATOR(TM) medial support device prevents overpronation - Continental(TM) Rubber for optimal grip in wet conditions