Keep a thermal lid on heat loss while climbing, cycling, hiking and backpacking with this lightweight Butter Beanie from Mountain Hardwear. Designed with a snug fit that easily slips beneath a climbing helmet or outerwear hood, the Mountain Hardwear Butter Beanie features a special moisture-wicking Butter cloth consisting of microfilament polyester and Lycra that's sanded on both sides for soft comfort that you'll wear throughout the day. Made from lightweight, compressible fabric, this cap easily slips into a spare pouch pocket until you need it.