It’s one of fashion’s trickiest things: layering. You don’t want to add unnecessary bulk, or look like you piled on everything in your closet with wild abandon. And when you work in finicky office environments—one minute it’s hot, the next it’s freezing—you want layers you can peel off and add on. The quickest way to learn? Check out PopSugar’s two-and-a-half-minute video, which illustrates expert tricks for spot-on layering: Mix materials, keep color family in mind, and get creative (crop tops over button-downs! Yes, you can still wear that sleeveless dress in winter!). Watch and learn and layer on, friends.