A charcoal suit and a navy crew-neck t-shirt are an easy way to infuse a sense of masculine sophistication into your casual styling arsenal. If you wish to instantly step up this look with one single item, throw in black leather tassel loafers. Clearly, you're looking at a nice idea for a roasting hot day. When it comes to dressing ideas for 30-something gentlemen, this ensemble is a good look on almost any gentleman.