This classic and casual combination of a sweater vest and white jeans is very easy to throw together without a second thought, helping you look stylish and ready for anything without spending a ton of time combing through your closet. A pair of loafers will smarten up your ensemble. When you have one of those bleak autumn days, sometimes only a cool ensemble like this one can cheer it up. Wondering what you should wear as you pass the big 5-0? This combo is a perfect example.