Demonstrate your skills in men's fashion in this off-duty combination of a navy plaid shirt jacket and navy jeans. Add a dash of stylish nonchalance to by finishing off with a pair of black leather work boots. Keep this look in your front hall closet come warmer days, and we guarantee you'll save time getting dressed on more than one occasion. And if we're talking casualwear for guys in their thirties, this look looks cool on most gents.