Cynthia Rowley has been the go-to source for cool, colorful rash guards. So it’s fitting that the designer’s brand-new line, Rowley, is focused completely on activewear.

“The lines are blurred between ready-to-wear and activewear now,” Rowley told “All the major stores that never had these clothes on the floor are carving out space for them.” The trend certainly isn’t going anywhere—sporty details appeared at countless New York fashion week shows. “It’s a different way to get excited. Activewear hasn’t really been thought about in terms of ‘collections,’” she explained. “I felt like no one was approaching it with the same mind-set, but this is how people dress.”

Rowley’s first activewear collection actually mirrors her Spring 2015 ready-to-wear. Track jackets, leggings, and innovative one-pieces share the same mod prints, swingy shapes, and bright colors as Spring’s trapeze dresses and flared pants. The collections are meant to be interchangeable—for example, the “sneaker sandals” she showed with scalloped running shorts for Rowley would be the perfect foil to Spring’s lace minidresses. “The whole point is that these clothes are supposed to make you feel good,” she said. “So really, they should translate to every area of your life.”