With a robust look shared by so many classic winter hats, the Singi Heater hat by Fjallraven was built using proven methods of keeping warm in frigid temps. Lined with 100% acrylic arctic fur, and fitted with folding ear flaps, this hat will keep your head warm on the coldest of days. Heavy duty G-1000 fabric defends against wind and water, and the double-lined brim keeps falling snow out of your face. Chin buckle for snug fit in high wind Tough, weatherproof exterior for ultimate warmth Ear flaps with "hearing holes" that don't compromise on warmth Equipped With G-1000 G-1000 is designed by Fjallraven to adapt well to different climate conditions. Made of densely woven polyester and cotton, this material provides thermal insulation and breathability, and the Greenland wax treatment makes it water-resistant.