Perfect the laid-back and cool look by opting for a charcoal crew-neck t-shirt and charcoal jeans. If you need to easily polish off this ensemble with shoes, why not add a pair of black leather chelsea boots to the equation? This getup isn't a hard one to score and it's summer-ready, which is important when it's boiling hot outside. On the lookout for outfit ideas for 30-something gentlemen? This combo goes straight to your favorites.