NWT. Runs Small and did not fit my husband, and we didn't return in time. Never worn. The site suggests sizing a half-size up. My husband is typically a 9.5, and these were still a bit snug. Men's Specter SC 2.0 White Lime Ultra-light SUPERCRITICAL foam cushion midsole designed by BRANDBLACK for Vibram High traction Vibram rubber outsole and shank for mid-foot support Ultra-light breathable mesh upper for comfort and strength Internal lining and padded collar area for maximum comfort