This lightweight trail running shoe is ideal for hard compact trail training and long-distance running. Synthetic leather and mesh upper. GORE-TEX membrane for waterproof, breathable protection. TPU lacing support - laces are attached to polymer upper supports to cradle the foot more evenly. Built on a women's-specific last. Meta-flex™: Incorporates a groove which is anatomically aligned in front of the metatarsal heads to provide a natural forefoot flex. Meta-shank™: New 5-finger meta-shank aligns with each individual metatarsal for greater flexibility when contouring while retaining underfoot impact protection. Met-cradle™: The upper webbing support is anatomically positioned to cradle the forefoot behind the metatarsal heads and provide a secure foot hold. The Fascia Band increases the structural stability of the arch area and the propulsive efficiency of the shoe. Sticky rubber outsole compound has been specially developed using climbing rubber technology. This rubber optimizes grip in wet conditions. Measurements: ; Weight: 8 oz ; Product measurements were taken using size UK 5.5 (US Women's 8), width B - Medium. Please note that measurements may vary by size.