Material: ThisUFO landing hat is made of polyester and is designed to keep your head cool and effectively block the sun during summer sports. It features an adjustable Velcro closure with an elastic band at the back and an inner sweatband to prevent sweat from dripping. Size: Circumference: 20.5-24.8 inches/52-63 cm, Height: 2.2 inches/5.5 cm, Brim Length: 2.95 inches/7.5 cm. It fits any style of sun hat. The inner sweatband effectively prevents sweat from dripping. Adjustable Sun Hat: Available for both men and women, one size fits all, this sun hat is adjustable for a comfortable fit. Lightweight and portable, it's ideal for outdoor activities. Suitable for all groups, suitable for men, women and teenagers, fashionable design style, can meet the needs of different age groups, can show personality and style through this hat, and easily match all kinds of clothing. This hat is perfect for sports, daily wear or outdoor activities. It can protect you in all seasons, keeping you dry and sun-proof, making it an ideal companion for your outdoor adventures.