To stay glistening in the good way (because "there's nothing as sexy as skin," which, true), Vo suggests keeping cool with a facial mist. The Tatcha Luminous Dewy Skin Mist ($48) is loaded with red algae and hyaluronic acid — which can feel like a nice hit of moisture when you're essentially stranded in a desert — but she also likes the NYX Professional Makeup Dewy Finish Setting Spray ($9).