This modern casual combination of a crew-neck t-shirt and brown sweatpants is super easy to throw together in seconds time, helping you look stylish and prepared for anything without spending too much time digging through your wardrobe. Let your styling prowess really shine by finishing off this outfit with grey athletic shoes. So as you can see here, it's an on-trend, not to mention spring-ready, ensemble to have in your seasonal closet. This combination shows how to dress fashionably as you progress through your teen years.