This combo of a grey long sleeve shirt and a crew-neck t-shirt is clean, sharp and extremely easy to copy. Round off with dark brown leather desert boots to punch up your outfit. This ensemble is most probably what you're looking for as a guy in his 30s.
Such items as a grey long sleeve shirt and a crew-neck t-shirt are an easy way to introduce effortless cool into your day-to-day casual repertoire. Black leather casual boots will bring a classic aesthetic to the look. This is a practical example of how to dress with style well into your 30s.
A grey long sleeve shirt and a crew-neck t-shirt? This is easily a wearable ensemble that you could rock a version of on a day-to-day basis. A trendy pair of burgundy leather casual boots is a simple way to breathe a bit of elegance into this ensemble. As a man in his 30s, you probably want to start dressing like a grown man. In this case, combinations like this are perfect as inspiration.