Showcase your credentials in men's fashion by putting together a mustard long sleeve shirt and black chinos for an off-duty getup. With shoes, go for something on the laid-back end of the spectrum by finishing off with a pair of low top sneakers. With an outfit like this in your winter arsenal, you're guaranteed to stay toasty and look stylish despite the uncomfortably cold temperatures. If you frequently wonder how to dress as a gentleman in his 20s, this combination is a tested option.