It’s based on the model used to keep U.S. troops cool and protected in sweltering conditions, but our Convertible Booney goes an innovative step further to help you keep your cool. Sure, it has all the features you’d expect, like the sturdy-yet-lightweight polyester ripstop fabric. Wicking sweatband. Even UPF 50 sun protection. But it’s during a full-on heat wave that you’ll really flip your lid over this cap – by removing the fabric top to reveal a cool mesh crown that’ll catch the slightest breath of a breeze. Order one up today and keep your chill attitude no matter how hot it gets.