Go for a pared down but at the same time casually cool look by putting together a beige v-neck sweater and a long sleeve shirt. If you want to feel a bit fancier now, throw in brown leather double monks. Those wondering how to dress with style as you reach your 30s, you have your answer.
The combo of a beige v-neck sweater and a long sleeve shirt makes for a cool relaxed ensemble. Get a bit experimental on the shoe front and introduce a pair of black leather loafers to the mix. As a gent in his thirties, you probably want to start dressing like an adult man. In this case, looks like this become very relevant.