The New Outdoor Research Windwarrior Hat (Charcoal/Black) Caps, unisex, Hats , Caps , General Caps, SM/MD (6 7/8-7 1/8), true, This heavy-duty cap is designed for serious mountaineers that tour in the toughest environments. Four-panel crown construction. Made from WINDSTOPPER technical fleece to stop the toughest of winds. Contoured earband provides full coverage. Sewn Outdoor Research patch at front. Lined with fleece to wick away moisture and provide warmth. Materials: WINDSTOPPER fleece: 100% polyester. Polartec Wind Pro: 90% polyester 10% spandex. Radiant Fleece: 95% polyester 5% spandex. Spot clean. Imported. Measurements: Circumference: 21 in Product measurements were taken using size LG/XL (7 3/8-7 5/8). Please note that measurements may vary by size.