"Yuni Beauty Air Dry Conditioner Hair Mist ($18) has proven to be the answer to my woes during this New York City heatwave. I keep a bottle of this thin, fresh-scented mist at my desk to bring down the frizz caused by this heat and humidity. A few spritzes tame my unruly waves, while spraying it generously on my hair when it's wet immediately detangles." — Jesa Marie Calaor, assistant editor, Beauty