If you're seeking to take your casual look up a notch, team a grey cable sweater with a short sleeve shirt. Finishing with black leather casual boots is a guaranteed way to introduce a little classiness to this getup. This one is a good-looking yet mature combo for a gentleman in his 30s.
Wear a grey cable sweater with a short sleeve shirt to demonstrate you've got serious styling prowess. If you want to immediately lift up this outfit with one piece, complement your look with a pair of black leather casual boots. Dressing inspo like this will help you remain incredibly fashionable while stepping into your 30s.
Who said you can't make a style statement with a relaxed outfit? You can do that easily in a grey cable sweater and a short sleeve shirt. To bring out a refined side of you, add a pair of black leather derby shoes to this look. If you worry about dressing age-appropriately, this ensemble is a safe option.