Upper: Energy saving, lightweight water-repellant Cordura with idro-treatment and FlexTec 2, water-repellant Lorica with Antiacqua external coating, durable Double Vibram rubber rand * Innovative 3D Flex ankle provides optimal upper hinge * GORE-TEX Duratherm lining gives insulated waterproof warmth * Vibram Lavaredo (Sticky Supertrek Rubber) outsole * Insulating 9mm Ibi-Thermo insole adds warmth