This casual combination of a blue cardigan and black chinos is super easy to pull together without a second thought, helping you look seriously stylish and prepared for anything without spending a ton of time digging through your closet. Finishing off with low top sneakers is the simplest way to add a more laid-back touch to your outfit. You can bet this outfit will become your go-to when cooler weather arrives. Wondering how to perfect casual style as you make your way through your teenage years? This pairing is a perfect example.