4-IN-1 VERSATILITY: Features a large detachable neck flap that tucks neatly into the brim when not needed. Deploy it for full sun coverage or stow it instantly for a classic hat look. Adjustable headband ensures a custom fit for 22.8"-23.6" head sizes. STAY COOL & DRY - The moisture-wicking sweatband instantly absorbs and evaporates sweat, while the air-mesh keeps proper ventilation - so you can enjoy your adventures with a fresh, dry feeling all day long. UPF50+ SUN PROTECTION: Crafted with high-quality UPF fabric, our hat defend against harmful UV rays, blocks 99% of UV radiation, shielding your skin during beach vacations, outdoor sports or daily errands. Enjoy the sun safely! ULTRA-LIGHTWEIGHT：Weighing only 162g, it provides all-day comfort without burden. The hat is effortless to carry and wear. Toss it in your bag or wear it all day. Zero bulk, all comfort. READY FOR RAIN OR SWEAT: With quick-dry and water-resistant design, the sun hat sheds moisture in minutes, so a sudden downpour won’t ruin your adventure. No more soggy hats. You can just shake it and go. Also, machine washable for easy care.