This polished combination of a blue dress shirt and charcoal wool dress pants will cement your sartorial expertise. Inject a laid-back touch into your ensemble by rounding off with red leather double monks. Keep this combination in your front hall closet when warmer days are here, and we promise you'll save time racking your brain for an outfit on more than one morning. As you head into your 30s, you want to start dressing in a more sophisticated manner. That's when combinations like this are a fail-safe option.