ONE SIZE FITS MOST Elastic drawcord at back of crown for adjustable fit. STAY DRY & COOL Mesh breeze-inducing vent to keep you cool and comfortable. ADJUSTABLE DRAWSTRING Adjustable chin drawstring for fixing the sun hat, especially in windy days. Rear adjustable elastic drawstring design, one size fits most adults head size. EASY STORAGE & CARRYY – Foldable and lightweight make it easy to carry, hiding it in your luggage, or backpack when you’re on the go or simply roll it up and put it in your pocket. Suitable for fishing, hiking, camping, travelling, hunting, boating, gardening etc.