The following is quoted from the web: New 4-panel balloon cap. This functional hat is made with Polartec material. Polartec is an attractive material because it is breathable, windproof, and insulating, while also being lightweight and durable. This material is mainly used for outerwear, but it is an excellent material for protecting the head. It has a chin strap that can be folded with buttons, allowing you to keep your ears and neck warm, and the brim is designed with a water-repellent nylon fabric on the underside. The balance between the large brim and the fitted crown creates a silhouette that has a street feel while also being functional. Size can be adjusted with the adjuster at the back. Size: FREE SIZE (Fits comfortably for those with a head size of 57CM-61CM) Material: POLYESTER 100% Retail price: ¥16,500 Will be shipped as compactly as possible.