One/Size's Mattifying Setting Spray VS. Glass Skin Setting Spray

Cosmopolitan

19-05-2025

What if I told you the number one selling product at Sephora isn't a trendy Summer Fridays Lip Balm or viral Sol de Janeiro body mist? That's right—the top-selling beauty product at Sephora is actually a setting spray. Specifically, the One/Size On 'Til Dawn Mattifying Waterproof Setting Spray. The beloved formula locks makeup in place (no transferring or smudging) for up to 16 hours, all while absorbing excess oil so your skin looks nice and matte. Even Beyoncé is a fan; she used the spray to keep her glam in tact during a three-hour rain-soaked performance. Oh, and Cosmo readers love On Til' Dawn too—it won a 2024 Readers' Choice Beauty Award for best setting spray.
Today, the iconic formula got an upgraded counterpart: the Powder Melt Glass Setting Spray. Think of it as the glowy, skincare-infused sister to the original formula. Inspired by the rise of glass skin, this new version is designed to hydrate while delivering a radiant, dewy finish that lasts all day. I got an early preview of the new Powder Melt Glass Setting Spray and have been testing it against the original to see how they compare. Keep reading for the full rundown—and whether or not the new launch is worth the same level of hype as the OG.
I first started using this setting spray when it launched a few years ago. I was commuting to grad school (via a 20-minute walk and a 30-minute subway ride) in the thick of NYC's September humidity, and needed something to help keep my makeup in place during the day. So I gave the formula a try after seeing so much hype on TikTok. It has a hairspray-like finish that feels more heavy-duty than any setting mist I'd used before. I will say that it wasn't exactly hydrating on my dry skin, but once it set, my concealer, blush, and even mascara stayed put for the entire day until I swiped it off with a micellar water-soaked pad at night.
Beauty editor Beth Gillette calls it her "going-out secret weapon" for her long and sweaty nights bar hopping around Brooklyn. "I come from the days of spritzing my face with legit hairspray to make my makeup last longer (2014 Pinterest was a scary time in beauty). But the One/Size Setting Spray is basically that, reimagined. It doesn't feel like I'm putting anything on my face, nor does it make my skin feel sticky or tacky. But it seriously locks down my makeup and leaves my skin looking matte and smooth. I have a mini that I take on every hot-weather vacation. I doused myself in it every day of Coachella—I truly cannot be without it in my makeup routine, ever."
As someone with dry skin who lives for a dewy finish, I was ecstatic when I heard about this launch. The original mattifying formula was never quite right for me—my skin is so dry that if I skip moisturizer, it starts to feel tight and borderline itchy. So anything even slightly matte is too much for my face. To be fair, I totally understand the hype around the OG. If you want makeup to last through sweat, heat, and humidity—and dryness isn't an issue—it absolutely holds up. But the glass formula? It's a game-changer for a glowy finish and/or anyone with dry skin.
Patrick Starrr (the founder of One/Size) described the new version as a formula that 'melts your powder into place,' and after testing it over a full face of makeup, I totally get it. It leaves this seamless, glassy finish—like you can't tell where my blush starts or my concealer ends. Everything just blends into one glowy, skin-like layer. It also makes my face feel refreshed and hydrated when I spritz it—the formula is packed with ceramides and ginger flower extract to help nourish the skin while keeping your makeup locked in place.
It gives me the hydration I need, with the same impressive staying power One/Size is known for. I wore it over my glam in the office and then to three hours of intensely watching a Knicks game at a bar, and it didn't budge. I also love the upgraded pump applicator over the original aerosol—it feels more skincare-forward, more precise when spraying, and of course better for the environment. The best part? The formula is also non-comedogenic, so you don't have to worry about it exacerbating or triggering acne while ya wear it. Truly no notes.
The new Powder Melt Glass Setting Spray is a heaven-sent for anyone with dry skin or after that ultra-smooth, runway-esque glassy finish. If you prefer a matte look, the original is still your best bet. But if dewy, hydrated skin is your goal—or if your complexion tends to feel tight by midday—this one's worth adding to your cart. I don't usually gush over setting sprays, but I must give credit where credit is due: Patrick Starrr really nailed it with this one.
Jasmine Hyman is the Assistant Beauty Editor at Cosmopolitan, where she writes about the latest beauty trends and must-have products. Her most prized beauty possessions are a meticulous skincare routine and salon blowouts. You'll also likely find her in bed reading a good book or endlessly scrolling TikTok (spoiler: it's usually the latter) while listening to Harry Styles' entire discography on repeat. Follow her on Insta to be inundated with pictures of her meals.