Plain Felt and Kling-On Sticky Rubber Soles Included OmniTrax 3.0 Interchangeable Sole System, compatible with other Korkers 3.0 accessory outsoles Water flows thru internal channels then out midsole ports, removing excess water and weight. Hydrophobic materials = faster dry times which lessen the chance of spreading invasive species. 2 lbs 7 oz (per pair, size 9) Note: Korkers recommends going up a size from your normal “street shoe” size