Ergodyne N-Ferno 6802 Thermal Winter Trapper Hat, Black, Large/X-Large DURABLE SHELL Wind and water-resistant nylon shell to keep you warm and dry during cold winters THERMAL WARMTH Insulated with 60 grams of Thinsulate Insulation from 3M WARM EARS Button flaps over ears with extra toasty insulation. Flaps have side holes for hearing VERSATILE Functional winter hat perfect for any outdoor activity, job or task that requires thermal protection in a cold environment COMFORTABLE SNUG FIT- fits head 27" around