40 Beauty Products Our Editors Discovered in 2021 and Now Can't Live Without

"Hair oil is a new product that I just started using this year, and now that I've added the Gisou Hair Oil ($46) to my routine, I can't imagine giving it up. Don't let its thicker consistency scare you away from giving it a try — I have very fine hair, but my ends drink up this hydrating formula like it's nothing. I apply it to my air-dried hair or as a final step after using hot tools, and it leaves me with a smooth and shiny finish." — JH