Breathable Mesh Design: This brimless hat features an ultra-breathable mesh structure made from premium polyester fabric, ensuring coolness and comfortable wear. Brimless Cap Design: This brimless hat combines the silhouette of a classic knit cap with the structure of a baseball cap, while the brimless design adds a stylish touch and elevates your street style. Size Details: Standard size is 55-60 cm/21.65-23.62 inches. An adjustable hook at the back ensures a comfortable and secure fit for all head sizes. It's a versatile choice for men's everyday wear. Please measure your head circumference before purchasing. Versatile Use: brimless hats for men is suitable for various indoor and outdoor activities such as running, cycling, camping, travel, skateboarding, or leisure. Designed for travel, it's foldable, easy to store, and resistant to deformation. Excellent Gift Choice: Available in two colors to easily match your various outfits, making it an ideal gift for loved ones, friends, family, etc.