For a casually stylish outfit, rock a grey plaid blazer with a white crew-neck t-shirt — these items play perfectly well together. Don't know how to finish off? Introduce a pair of navy and white canvas low top sneakers to this getup for a more relaxed twist. You actually can keep your cool under the sweltering heat. The proof is right here Rock this getup to pull together a more conservative look as a guy in his 30s.