A long sleeve t-shirt and sweatpants paired together are the ideal look for those who love casually dapper styles. Complete this ensemble with a pair of white and blue leather high top sneakers and ta-da: your ensemble is complete. Keep this getup in your head when spring comes, and we guarantee you'll save time trying to pick out an ensemble on more than one morning. Wondering how to nail casual looks as you go into your 40s? This pairing is a great example.