Lightweight, low-profile jersey-knit liner beanie, made with a blend of merino wool and recycled polyester, can be worn alone or under a helmet or hat for added warmth. All of the virgin wool Patagonia sources is certified to the Responsible Wool Standard (RWS) to help ensure protection both for the animals that supply it and the land they graze. Fair Trade Certified Overlook Merino Wool Liner Beanie