"My greasy T-zone likes to make an appearance during lunchtime, so I carry mattifying beauty products in my purse at all times. The only problem is that most of my setting powders are of the loose pigment variation, which can create a mess if you're applying on the fly. So I was thrilled when I got my hands on Urban Decay's Waterproof Setting Powder ($34) — or, as I've come to think of it, the pressed version of its All Nighter setting spray. It instantly mattifies your complexion without making your skin feel sticky or look cake-y. Plus, if you're hitting the pool this Summer or just sweating your ass off, it's waterproof, so you can do your thing without worrying about your face melting off." — AS