Dress in a white crew-neck t-shirt and skinny jeans if you wish to look casually dapper without too much work. Make this outfit slightly more elegant by rounding off with white plimsolls. This combination should clear any doubts you had about wearing casual clothes in your thirties.
Definitive proof that a white crew-neck t-shirt and skinny jeans look awesome when combined together in a laid-back look. Introduce white low top sneakers to the mix to instantly bump up the fashion factor of your look. Overall, a perfect demonstration of casual style for gents in their 30s.