Tired of beating by the harsh rays of the sun? Our revolutionary UPF 50 Sun Hat has a built-in UV barrier that reflects 80% of the sun's heat and 99% of the damaging UV rays, also keeps you up to 20 degrees cooler. The secret is the evaporative cooling inner liner, which is an advanced hydro-cooling technology. Simply wet the evaporative lining and put on the sun hat, you can get an instant cooling effect and stay comfortable through the day. Made from the durable, breathable and lightweight material with military standard, this sun hat is a must-have protective item for all sports lovers, and gives you a brand new outdoor wearing experience. FEATURES: Built-in UV barrier : Blocks 80% of the sun's heat and 99% of harmful UV rays Evaporative cooling inner liner : keeps your head 20° F cooler instantly Breathable and lightweight with ventilated material : perfect and comfortable for outdoor use