The Merino Airlite Pro Crew Sock boasts the perfect combination of softness, durability, and performance. Wigwam's patented UltiMax Pro moisture control system combines with soft Merino wool to keep feet dry and blister-free. Breathable mesh panels help prevent overheating so feet stay cool and comfortable. The seamless toe closure eliminates bunching for a smoother fit. The sock is knit from an ultra-lightweight blend of 34% Merino wool; 32% stretch nylon; 27% Dri-release Tencel (88% polyester, 12% Tencel); 6% spandex; and 1% stretch polyester fabric. Made in the USA.