Korkers Metalhead 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 Low profile Boa speed lacing system for quick on/off and custom fit; significantly faster than previous system 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