Smartwool Merino Beanie The Merino Beanie is a lightweight, year-round essential. Run, skate or ski in it, or wear it under a helmet for a chilly morning cycle. It's a great essential for all your activities. A great companion for any of your adventures, the Merino Beanie uses Smartwool's lightest-weight Merino jersey fabric with a recycled nylon core that increases the garment's durability and provides exceptional next-to-skin comfort. The beanie has clean seams which offer a no-bulk fit, preventing irritation and abrasion from causing discomfort. Ensuring you remain comfortable, the hat has moisture-wicking properties, meaning sweat and moisture is wicked from the surface of your skin, in order to keep you dry.