This combo of a navy chambray long sleeve shirt and navy skinny jeans is indisputable proof that a straightforward off-duty getup doesn't have to be boring. A trendy pair of black leather chelsea boots is the most effective way to bring a bit of polish to this ensemble. We love that this outfit is great when cold days set it. This getup should clear any doubts you had about dressing elegantly as a 20-year-old guy.