FootJoy ProDry Men's Low Cut - Black (7-12) Lycra/ spandex provides excellent fit and superior stretch and recovery. Dri-Lex helps lift moisture and vapor off the skin, allowing for a drier, more comfortable sock. FootJoy reinforces the heel of its socks by double-layering the heel area which provides support and cushioning in a known high abrasion area. Comfort Seam is FootJoy?s exclusive enclosed toe seam for advanced comfort and fit. Always Buy Authentic!!