This semi-casual combination of a trenchcoat and a long sleeve shirt is extremely easy to put together in no time, helping you look awesome and ready for anything without spending a ton of time digging through your wardrobe. Complement your getup with a pair of black leather double monks to avoid looking too casual. As you're moving from your 20s to your 30s, you want to start dressing with more refinement. If that's the case, outfits like this become very relevant.