La Sportiva Men's Spantik Boot 100% Leather carbon fiber sole OUTER BOOT: PU-Tech transparent, PU-coated, embossed Benecke CeraCom PUR leatherette / Water-repellent Lorica with Antiacqua external coating / Vibram rubber rand / Molded TPU ankle backstay reinforcement / PE micro-cellular thermal insulating closed cell foam lined with a thermo-reflective aluminum facing coated with an anti-abrasion flocking coated with an anti-abrasion flocking INNER BOOT: Micro-perforated thermo-formable PE / Water-repellent Lorica with Antiacqua external coating INSOLE: 5mm thermal structure carbon fiber and aluminum insulation MIDSOLE: TPU / Dual-density Micropore EVA WEIGHT: 44.48 oz (1261g)