Some days you want minimal coverage but optimal warmth. That is where the Merino Sport Fleece Wind Training Headband by Smartwool comes into play. Stay comfortable on your morning run thanks to the windproof front panel and enjoy the super-soft warmth of soft-brushed Merino next to the skin. Balance comfort and performance no matter the weather. The wind-resistant headband is made of 46 Polyester 38 Merino Wool 16 Elastane with an overlay of 85 Nylon and 15 Elastane.