Vasque St. Elias GTX Hiking Boots - Women's An agile, lightweight backpacking boot, Vasque's St. Elias combines all-leather comfort with a cutting-edge, weight-optimized outsole that conforms to the irregularities of the trail for ridiculous traction and feel. TPU shank provides support underfoot on uneven terrain Vasque exclusive Vibram Frontier rubber outsole with Vibram XSTrek compound for outstanding uphill/downhill traction, slip resistance, grip, and durability; secure downhill stopping power; inset spikes promote release of debris and mud. Worn only a handful of times, but a bit too small for me. Wish I could keep them!