When you're pushing hard on winter trail runs or skinning up for another alpine tour, the Outdoor Research Alpine Onset Merino 150 Balaclava delivers the perfect balance of warmth, breathability, and adaptability for high-output cold weather activities. Built with a premium blend of non-mulesed merino wool and recycled polyester, this lightweight 37g balaclava naturally regulates temperature and fights odor while you're moving fast in challenging conditions. The game-changing hinge construction lets you adjust face coverage on the fly - pull it down when you're working hard on the ascent, flip it back up when the wind picks up on exposed ridges. Whether you're ski mountaineering at dawn or grinding out winter trail miles, this technical base layer keeps you comfortable without the bulk, featuring UPF 30 protection for those brilliant bluebird days when snow reflection becomes a factor.
