For an outfit that brings practicality and dapperness, try pairing a tan print hoodie with olive cargo pants. You could perhaps get a little creative in the footwear department and add white leather low top sneakers to the equation. Perfect to tell people that you're mature and confident enough to hold your own in the sartorial department.
If you like comfort dressing, consider pairing a tan print hoodie with red and white vertical striped sweatpants. Go off the beaten track and spice up your look with white leather low top sneakers. This combo should clear any doubts you had about dressing casually in your thirties.
If the setting permits casual city style, choose a tan print hoodie and black skinny jeans. A pair of white leather low top sneakers introduces a sophisticated aesthetic to the outfit. Men wondering how to pull off cool off-duty looks as you move into your 30s, this ensemble should answer your question.