Please click for the La Sportiva Size Conversion. A piece of art, state-of-the-art, mountain boot. PU-Tech transparent PU-coated embossed Benecke CeraCom PUR leatherette upper. Water-repellent Lorica with Antiacqua external coating. Vibram XSV rand. Molded TPU ankle and backstay reinforcement. PE micro-cellular thermal insulating closed cell foam lined with a thermo-reflective aluminum facing coated with an anti-abrasion flocking. Micro-perforated, therm-formable PE foam innerboot. Water-repellent Lorica with Antiacqua external coating. Vibram Montagna outsole plate for durability. HP3/Dual-density micropore EVA midsole. 5mm Carbon Fiber insole with thermical, structure, and central insert in polyester and aluminum insulation. Innovative FLS (Fast Lacing System). Integral gaiter collar keeps spindrift and debris out. Weighs 5 lbs. 1 oz. Weight of footwear is based on single item, not the pair.