Keep your noggin warm and look good to boot. ; Made with Alpin-wool™ Plus fabric, a wool/nylon blend exterior with soft fleece lining. ; TransAction™ headband for comfort and moisture management. ; Double-weave, stretch Cordura® face/Thermolite® polyester back and tuck-away earflaps. ; 21 5/8 circumference (SM/MD) or 23 1/4 circumference (LG/XL). ; 63% polyester, 26% wool, 11% nylon. ; Wash separately from other garments.