US Patent 8109012 Article of footwear with drainage features

An article of footwear configured to drain water away from a foot wearing the article of footwear includes a plurality of drainage holes positioned between ribs formed on the sole. The drainage holes are formed along a centerline of the sole. The drainage holes are substantially vertical channels formed entirely through the sole. The ribs include raised center portions disposed at or near the inlets to the drainage holes to lift the foot away from the drainage holes.