Quite possibly the most versatile trend for summer, the "airspace" haircut is all about creating a light, airy texture — and there are many different ways to wear it. "'Airspace' celebrates this idea of negative space," says Sunnie Brook, celebrity hairstylist and Biolage global ambassador, who coined the term. "This cut is about removing weight to create movement with no steps and giving the hair an airy look and feel. Or it can be a juxtaposition in the hair shape. Think: extreme side parts, seamless layers, and for the brave ones, cutouts or undercuts on shorter haircuts."