FootJoy ComfortSof Men's Roll-Top Socks (3 Pair) White (7-12) Lycra/ spandex provides excellent fit and superior stretch and recovery. Acrylic is a soft fiber that provides good moisture management, has excellent shape retention, and holds color well. 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!!