Korkers Mudder Ducker Boot with Kling-On and Studded Kling-On Outsole Includes Plain Kling-On and Studded Kling-On Sticky Rubber Soles OmniTrax 3.0 Interchangeable Sole System adapts your traction to meet the performance needs of each river system Quick Cinch lace system for a quick and secure customized fit Waterproof materials reduce water absorption, thereby reducing overall weight and dry faster helping to prevent the spread of invasive species Integrated midsole drainage ports allow water to drain quickly keeping boots lighter