Size: Free (with size adjustment drawcord) Up to 60cm Outer: POLYESTER 100% Lining: POLYESTER 100% Depending on the climate and scene, this cap features a 2-way design with a detachable microfleece earflap. It also has a wire in the brim, allowing you to change the shape of the brim depending on the situation. In addition, the main body lining and the microfleece with earflaps have dot buttons, so you can attach them together for use in outdoor activities such as windy days or snowboarding. This is a key detail. This is a versatile design and functional item that will be useful in all situations.