For high altitude mountaineering and touring in extreme environments, the Wind Warrior Hat offers the toughest protection from harsh winter winds.. . Made from WindStopper Technical Fleece. WindStopper laminated fleece is windproof, warm, and manages moisture. Full fleece lining for additional warmth. Integrated Polartec Wind Pro ear panels improve hearing. Polartec Wind Pro is soft, breathable and water repellent with four times the wind resistance of conventional fleece. Four panel crown construction. Contoured fit for ear coverage.