Fjällräven's Nordic Heater is an extremely warm hat with synthetic fur on the peak, ear flaps & edges. It provides perfect warmth & protection against the wind in both polar climates & biting winds. The outer material is soft, quiet polyester with fluorocarbon-free impregnation. The ear flaps can be folded up & fastened with a button on the side, or held in place with a strap under the chin so the hat stays on in strong winds.