Smartwool Active Fleece Wind Headband 47% Polyester, 38% Merino Wool, 15% Elastane WINTER WARMTH. Some days, you want minimal coverage with optimal warmth. That's where this Headband comes into play. The windproof front panel will help you balance comfort and performance in any weather. ACTIVE MERINO FLEECE. Made for cooler weather, this lightweight, stretchy knit fabric puts soft-brushed Merino fleece next to skin and durable recycled synthetic material against the elements to balance comfort and protection. WHY MERINO WOOL? Thinner and softer than regular wool, it's easy to wear next to skin. Each fiber transports sweat away as a vapor (we tested it ourselves) and regulates body temperature to keep you cool in summer and warm in winter. RECYCLED FABRIC. Made from a blend of Merino Wool and recycled polyester for increased durability and sustainability, this soft, lightweight headband offers cozy protection for adventurous cold days. FUNCTIONAL FEATURES. Go far, feel good with thoughtful tech to keep you adventuring comfortably ? windproof front panel for increased protection from the elements while reflective elements give visibility in low-light conditions.