A navy and green crew-neck t-shirt and grey chinos paired together are the ideal look for those dressers who love laid-back and cool styles. This outfit is completed nicely with white leather low top sneakers. When it's one of those dull fall afternoons, what better to brighten things up than a dapper ensemble like this one? This combo illustrates that figuring out how to dress stylishly as you progress through your teens is not particularly hard.