Designed for Big Heads: X-Large (XL/XXL) size best for 61-64cm,24"-25.2"inches,7 1/2- 7 7/8 is adjustable to comfortably fit. It ensures a snug and secure fit thanks to its fitted design and elastic closure. Waterproof & Upf 50+: made of premium polyester technological fabric which effectively prevent water molecules from entering, to ensure your outdoor sports carefree. New laminating process inside, which blocks all needle holes and prevents water from sinking for hours. Rain hats could also be used as sun hats, with UPF50+ effectively blocking more than 99% of UV rays to protect your eyes and face. Ultra-Light & Packable: This lightweight waterproof baseball cap weighs only about 1.64 ounces (44.8g), which allows you to wear it all day without stressed feeling. Unstructured panels folds easily, making it convenient for carrying and keeping in your bag even pocket, so you could use it whenever and wherever you need. Safe & Breathable: This cap has a reflective belt in brim and also in back closure so that you would be seen more clearly. Especially for night, rain, fog, snow and other poor sight environment. General waterproof materials do not have good air permeability, but our waterproof rain hat is breathable. It can quickly remove moisture sweat wicking and keep you cool after exercise. The internal sweatband is designed to keep you neat and comfortable, prevent you from sweating in hot weather. Multi-purpose: Ideal for a range of sports and outdoor activities, including golf, hiking, fishing, and more. This hat is more than a running cap for men, it's a versatile addition to any athletic wardrobe. Searching for the perfect athletic hat that comfortably fits larger head sizes? Look no further than the TOP-EX Running Baseball Cap. Specifically designed to cater to larger head sizes from L to XXL, this hat blends style and function, providing both the perfect fit and aesthetic appeal. Whether you're hitting the golf course, embarking on a workout, or just heading out for a casual day, this cap offers optimal comfort and performance. Our cap utilizes technology to promote breathability, ensuring you stay cool even during intense workouts or in hot weather. In essence, this running hat doubles as a cooling hat, designed to lower your body temperature and maintain comfort in warm conditions.