To put together a casual outfit with a modern spin, marry a long sleeve shirt with white and navy chinos. Bump up the formality of this look a bit by slipping into beige suede derby shoes. You might be thinking that just because winter is colder you have to sacrifice on style, but it's just not true, and this look is proof. Just because you're a teen guy, doesn't mean you can't dress up like a young gentleman, and this combo demonstrates exactly that.