The moisture moving, premium CoolMax® fabric, moves moisture to keep feet dry and comfortable. The anti-crimping flex design with arch support and "Y" heel holds the sock in place. Mesh vent panels enhance airflow for improved breathability. Reinforced heel and toes for improved durability. Cushioned bottom reduces shock and impact. Content: 85% CoolMax®, 12% polyester & 3% Lycra. Weight: Lightweight.