Athletic-style clothing can be summed up by pieces that fall into the realm of sportswear, including sweats. Brands like T by Alexander Wang, Publish, Wings and Horns, and Acne have designed their interpretation of cotton sweatpants. It's an easy way to look great without trying too hard. Try pairing them with a more put-together look up top, or with a basic tee and dope sneakers for a simpler look. The key to avoiding a sloppy look is going for a trim, not skinny, silhouette.