While there’s nothing wrong with a bit of frizz (it is volume, after all), I like to know that I can control it if I please. The best way to do that is with frizz-fighting hair products that hold up against moist, muggy days. After much testing (and many failures), I’ve finally landed on some tried-and-true finds—from high-hold gels to lightweight sprays—that will keep frizz at bay, even in the highest of humidity.