La Sportiva Men's Pamir Hiking Boot 100% Leather and fabric Rubber sole Boot opening measures approximately 12.75" around Upper: 2.8mm greased Idro-Perwanger leather; Lining: Leather Insole: 7mm Trangoflex Midsole: PU Lite/EVA Sole: Vibram&reg; PU Lite/EVASasslong with Impact Brake System&trade; Weight: 31.0 oz/882 g