FIBERS: 50% Coolmax, 20% Cotton, 20% nylon, 10% acrylic.FEATURES: Patented Wick-Dry® construction complemented with Coolmax™ for superior moisture transport and warmth. Elastic arch support molds to individual foot. Breathable non-terry front “Vamp” ankle panel eliminates bunch up and boot pinch. X-Tra cushioned sole for all-day performance.