SmartWool Running Hat 100% Merino Wool - Knitted in Vietnam, Merino is nature's most technical, high-performance fibre. Its complex structure makes it remarkably soft against your skin, helps regulate your body temperature, and stays looking great wear after wear. Double-Layer Earband with Flat-Lock Seams - Featuring a contoured fit, flat-lock seams provide additional comfort and helps to prevent the risk of chafing. 4 Panel Design - The beanie features 4 panels, creating a slim-line, snug, and comfortable fit. Jersey Knit Construction