Why not marry a black sweatshirt with a white crew-neck t-shirt? These two pieces are very comfortable and will look amazing together. To give your overall ensemble a more laid-back spin, add a pair of white leather high top sneakers to the mix. If you're in search of a knockout ensemble that will take you from winter to spring, this just might be it. This combo illustrates that well into your 30s you have a wide range of dressing options.