This combination of a light blue double breasted blazer and a crew-neck t-shirt is a must-try casually neat outfit for any modern guy. And if you wish to immediately perk up your outfit with a pair of shoes, why not complement this outfit with a pair of grey suede tassel loafers? No doubt, it's easier to work through an extremely hot summer afternoon in a light and breezy look like this one. Wondering what to wear as you slip into your 40s? This combo is the perfect answer.