Go for a simple but at the same time casual and cool option in a charcoal bomber jacket and grey vertical striped chinos. Complete your outfit with a pair of low top sneakers and the whole outfit will come together. As you're going from your 20s to your 30s, you probably want to start dressing like a grown man. In this case, combinations like this are perfect as inspo.
Charcoal Bomber Jacket with Low Top Sneakers Smart Casual Warm Weather Outfits For Men In Their 20s
If it's comfort and functionality that you appreciate in menswear, choose a charcoal bomber jacket and navy chinos. Send your getup a less formal path with low top sneakers. If you're wondering what you should wear as a 20-something guy, this ensemble gives a good idea.