12 Styling Products I Swear By For Smooth, Sleek Hair — Even in Peak Summer Heat

The Living Proof Perfect Hair Day Night Cap Overnight Perfector ($29) works while I'm fast asleep, so what could be easier than that?! I just put it on before bed and pull back my hair, and the amino acids, antioxidants, and time-release conditioners hydrate and revitalize, with no need to rinse it out in the morning, either. This product also helps seal cuticles, protects color, and makes my hair less frizzy, plus, it doesn't get all over my sheets and pillowcase (with results lasting up to several days after application).