For a casually refined ensemble, consider pairing a cardigan with grey chinos — these two items go pretty good together. A pair of tobacco casual boots looks awesome here. As you're going from your 20s to your 30s, you probably want to start dressing maturely. If that's the case, combos like this are a safe option.
A cardigan and navy check chinos are the kind of a fail-safe casual ensemble that you so desperately need when you have no extra time to dress up. Feeling brave? Jazz things up by slipping into a pair of tobacco casual boots. A great getup to show your maturity even as a young gent.
Consider teaming a cardigan with black jeans to put together a cool and casual ensemble. Complete your outfit with tobacco casual boots to instantly ramp up the fashion factor of any look. This getup is a great inspo to anyone who was hesitant about more elegant outfits in his 20s.