These are the walking shoes with a patented sole that helps to relieve knee pain. Developed with rheumatology experts, the shoes employ flexure zones built into the outsoles, proven in a study at Rush University Medical Center in Chicago to reduce knee load by 20%, essential for slowing the progression of osteoarthritis. Strategically placed to enable normal motion, the soles' flexure zones provide natural, barefoot-like flexibility with the support of modern footwear, a quality that earned them the prestigious American Podiatric Medical Association's Seal of Acceptance. EVA insoles provide comfort with every step, from forefoot, arch, and heel while the rubber outsoles ensure an even, reliable grip while walking. Their breathable mesh uppers keep feet dry and comfortable. Light Gray with Dark Gray trim. If in between sizes please order the next size up. (3 oz.)