The classic beanie, with a little more. Built with an extra-fine merino yarn, this beanie is amplifiedwith innovative 37.5® technology. Its merino wool construction is reinforced with 37.5® polyester, which helps to maintain the ideal core body temperature of 37.5°C. Additionally, this technology maintains relative skin humidity to 37.5%, expertly wicks moisture away, and traps heat when needed. An essential piece for daily wear and active pursuits, the Norse Top Beanie is finished with fine ribbing.