Power Wool™ Skull Cap in Black/Glacier GreyA highly versatile beanie that's perfect for activity done in colder conditions, or a summer evening in the mountains. Constructed of Polartec Power Wool, a smart blend of plush merino and technical stretch fabric, this thing keeps you just warm enough as the heart rate goes up. Ultralight (24 g!) and compressiblesquish in the palm of your hand for bring anywhere, year round utility Single layer design in a classic skull cap silhouette for increased