For a casually sleek outfit, try pairing a grey double breasted blazer with jeans — these two pieces work really great together. You can take a more laid-back approach with shoes and complete this getup with a pair of white and red athletic shoes. Come baking hot sunny days you're looking for a look to keep you fresh and sharp –– this outfit is perfect for this time. As a gent in his thirties, you want to start dressing more like a mature gentleman. That's when getups like this become very relevant.