Integrated, large drainage ports and internal midsole drainage channels Includes Plain Felt and Kling-On Sticky Rubber Soles OmniTrax 3.0 Interchangeable Sole System, compatible with other Korkers 3.0 accessory outsoles Hydrophobic Upper Materials: faster dry times to lessen the chance of spreading invasive species Enhanced midsole design, scratch rubber toe cap extends to side panels, rubberized anti-abrasion synthetic material, 2lbs 15oz per pair Integrated, large drainage ports and internal midsole drainage channels