For a look that's worthy of a modern sartorially savvy gent and effortlessly sleek, pair a dark green military jacket with a long sleeve shirt. If you wish to immediately up the ante of this getup with shoes, why not complete this ensemble with black leather chelsea boots? So if you're looking for a look that's stylish but also feels totally spring-appropriate, look no further. Combinations like this are what at the end of the day will bring you more confidence as a 20-year-old gentleman.