This winter cap is chuck full of warmth. It is the warmest hat by far. The exterior is a grey/blue boiled wool combination. The side, neck and frontal flaps are of a tightly tufted faux fur in the greatest sky blue hue. The interior is of a tightly quilted fabric. That is a definite benefit because the closer the quilting, the more pockets to hold in body heat. It is a beautiful European military Winter cap.