Size: Available in two sizes. M:head circumference:56-59cm,hat height:13cm,brim length: 7cm;xl:cap circumference:59-62cm,hat height:13cm,brim length:7cm The adjustable design ensures a comfortable and secure fit. Quick-drying and mesh design: made of efficient, quick-drying nylon material and breathable mesh fabric that keeps your head cool and dry. Perfect for hot summer days and humid environments to increase comfort during outdoor activities. Lightweight: lightweight design, no strain when wearing. It is perfect for running, hiking or any other outdoor activity where you need a lightweight and breathable hat. Soft and comfortable: comfortable soft top design, more comfortable to wear on the head and easy to fold and store. This hat has a moisture-wicking sweatband to make you feel comfortable at all times. Sun protection and occasion: protects the skin from harmful ultraviolet rays, ideal for running, hiking, cycling, walking, gardening and daily wear, going to work, attending baseball games and also need such a hat. It is a comfortable, simple hat.