US Patent 9210965 Article of footwear with ribbed footbed

An article of footwear configured for prolonged casual and non-casual uses having an upper configured for easy installation and removal of the article of footwear with or without the use of fasteners, a sole, and a substantially continuous series of alternating ribs and grooves on a footbed of the sole extending from a forefoot region to a heel region. The ribs and grooves have base widths that are greater in an arch region of the footbed than the forefoot and heel regions of the footbed. The series of alternating transverse ribs and grooves are oriented from a lateral side region of the footbed to a medial side region of the footbed.