Wear a white and black print crew-neck t-shirt and grey sweatpants to assemble a seriously stylish and bold casual ensemble. Complement this look with navy woven leather slip-on sneakers for a sense of elegance. As you can see here, it's extremely easy to look amazing and stay toasty come fall, all thanks to looks like this. Great for a man in his twenties if you want to present a laid-back spirit.