The Arcteryx Billi Brim Hat provides comfortable warmth. Made with 50/50 wool and acrylic, the Billi Brim hat has an expandable volume to fit almost any hairstyle. The Arc'teryx Billi hat features a flexible stubby brim and one wide stripe for a low profile style. A nice thick knit, the Billi Brim is a full 4.7 ounces of coziness. The Arcteryx Billi Brim Hat will keep you warm without sacrificing your style.