Strideline Athletic Crew Socks Colorado Black Gem 4400511 Strapped Fit Men's Fan 1% spandex Bold colors in digitally printed ink Double elastic calf provides stretch & performance Patented heel strap secures ankle mobility & fit. Stridetec wicking fabric optimizes breathability Double spun nylon gives increased arch support. Material Content may vary slightly. Approximately 42% Nylon, 39% Polyester, 15% Cotton, 3% Elastic, 1% Spandex Fits mens shoe sizes 6-12