Tie-dye is back—but it’s not the folksy flower-child look your parents wore at Woodstock. The new style, called ombré, gradually fades colors into each other, creating a floaty, ethereal appearance. It showed up on skirts and dresses on the spring runways of Stella McCartney, Prada, and Diane Von Furstenberg. H&M’s take is a breezy knee-length dress that works well with a dark St. Barts tan and flat thongs. At a mere $29.90, it beats your mother’s hand-me-downs from her days at Kent State. (For store locations, visit hm.com.)