The New Outdoor Research Sonic Balaclava (Black) Cold Weather Hats, unisex, Hats , Knit , Cold Weather, MD (7 1/8), true, Think of the Sonic as a softshell - for your head. This versatile Outdoor Research balaclava can be worn several different ways to match Mother Nature's mood. Balaclava can be worn for full/partial coverage and as a gaiter face mask and beanie. WINDSTOPPER Technical Fleece blocks bone-chilling wind from cutting through while letting moisture vapor escape for total comfort. Polartec Wind Pro ear panels provide warmth without muffling noise and inhibiting ability to hear. Contoured shape provides the most effective warmth and coverage. Mesh breathing port. Flatlock seams prevent chafing and irritation. Elastane trim. 16 circumference. 100% polyester. Wash in cold water and dry flat.