Hi-Tec Sierra Lite I Waterproof Walking Boots Vibram rubber outsoles - High performance Vibram outsole delviers world renowned traction, comfort and durability. V-Lite design - A revolutionary build concept that strips away as much weight as possible without sacrificing performance or durability. ion-mask waterproof upper - It repels water from outside and maintains optimum control of temperature and breathability. It resists the absorption of water and dirt and also helps guard against stains. i-shell Upper - This technology enhances both fit and support. So hikers/walkers can walk with great comfort. Ortholite insole - This is a removeable ortholite insock for premium comfort, cushioning and durability.