Combining a mustard long sleeve shirt and grey dress pants is a guaranteed way to infuse a refined touch into your closet. If you need to easily tone down your ensemble with footwear, complete your ensemble with burgundy leather desert boots. This combination is likely to become your summertime favorite. As you step into your 30s, you probably want to start dressing more maturely. If that's the case, outfits like this are a never-failing option.