A blazer and a long sleeve t-shirt have become indispensable casual must-haves for most guys. Let your outfit coordination prowess truly shine by complementing this outfit with a pair of white canvas low top sneakers. So as you can see, it's very easy to look seriously stylish and stay warm when chillier weather comes, all thanks to combos like this one. All in all, a good demonstration of casual fashion for guys in their 50s.