Protect your ears from cold blasts with this lightweight, highly breathable headband that's 4 times more wind resistant than regular fleece. . Polartec Wind Pro fabric of polyester and spandex for warmth without weight. Smooth, tightly woven outer surface is sheds light moisture. Soft fleece inner surface traps warm air. Highly breathable Polartec Wind Pro is 4 times more wind resistant than regular fleece. Water repellent, durable, and pill resistant. Flatlock seam for comfort against the skin and a smooth fit. Machine washable. Opening circumference: SM: 19.25 in. LXL: 20 in.. Width: 3 in.. .