Breathable mesh: The top of the hat is made of breathable nylon mesh, which is nice and comfortable. There are breathable holes on both sides to make your head breathable in the sun and strong sunshine. Lightweight and comfortable breathable lightweight thin material allows quick drying foldable Closure: drawstring Material: polyester, UV protection and sweat absorption: UPF 50+ sun hat protects your skin from over 90% sun damage and the sweatband can reduce the discomfort caused by sweat. Great gift for your family or friends Safari Care instructions: Hand wash only FREE SIZE: an adjustable band built into the sweatband. Best fit for 55-60cm 21.65"-23.6".Recommended hand wash and hang to dry.