A navy long sleeve shirt and grey dress pants are robust sartorial weapons in any man's arsenal. Add a pair of loafers to the mix et voila, the outfit is complete. This outfit is a tested option if you're looking for a great, summer-appropriate outfit. As you're moving through your late 20s, you want to start dressing in a dressier manner. In this case, outfits like this become a great source of inspiration.