The Saucony Inferno Merino Wool blend Quarter sock is best in class with natural wicking and temperature regulation to keep you comfortable no matter where your run takes you. Merino Wool blend with seamless construction, engineered arch and heel lock stability to provide superior performance, fit and comfort all year long.Details: Merino wool comfort and performance Engineered heel lock & compression arch support technology for the perfect fit Naturally wicking and temperature regulating for year-round wear Airmesh venting for maximum airflow Seamless toe to prevent irritation Best for: On the trail or workouts Fiber Content: 46% Polyester, 22% Merino Wool, 22% Acrylic, 7% Nylon, 3% Spandex