For an ensemble that's pared-down but can be dressed up or down in many different ways, pair a tan suit with a grey hoodie. If you don't want to go all out formal, add a pair of low top sneakers to your look. This outfit is a big inspo to anyone who was doubtful about sleeker style as a teen.
So as you can see, it doesn't require that much effort for a man to look effortlessly classic. Pair a tan suit with a white crew-neck t-shirt and be sure you'll look amazing. Send an otherwise classic outfit down a more casual path by rounding off with low top sneakers. Outfits like this are what will gain you respect from people around you in the long run.