Korkers Guide Boot with Felt and Kling-On Outsole Includes Plain Felt and Vibram Idrogrip soles 2mm Rubber wrapped uppers for maximum durability, limiting water absorption Exceptional ankle support delivered through a Thermoplastic Polyurethane cage OmniTrax 3.0 Interchangeable Sole System adapts your traction to meet the performance needs of each river system Waterproof materials reduce water absorption and dry faster to help prevent the spread of invasive species