This U.S. Military Flyer's Hat provides thermal management for any cold front. Ear flaps fight back the chills, secure out of the way when not needed. For work, camping, cold weather hunting or just general everyday preparedness. Heavyweight cotton canvas Thermal wool lining Designed for wear under a helmet, or on its own Hook-and-loop ear flaps secure around neck Pass-through holes for helmet chin strap Expandable elastic fit Machine wash, lay flay to dry