We're all looking for functionality when it comes to styling, and this modern casual combination of a black leather biker jacket and black and white print sweatpants is a perfect example of that. The whole look comes together if you complete this look with a pair of white and navy leather high top sneakers. So so as you can see, it's a killer, not to mention season-appropriate, combination to have in your transitional sartorial arsenal. Gents wondering how to sport modern casual dressing in your 30s, this outfit should answer your question.