The Airtube Ergo Merino is made from a 35% merino wool and 65% polyester blend that provides natural warmth and odor resistance. It features moisture-wicking and quick-drying properties to keep you dry during high-output activities. The ergonomic design contours to the face for a secure, comfortable fit. Its lightweight, compact construction packs easily for travel or changing conditions. The breathable fabric with Airhole vent prevents condensation and keeps goggles fog-free, making it suitable for skiing, snowboarding, hiking, and other cold-weather activities.