This relaxed casual combination of a navy crew-neck sweater and brown chinos is extremely easy to throw together without a second thought, helping you look seriously stylish and prepared for anything without spending too much time digging through your wardrobe. A pair of white low top sneakers will effortlessly play down an all-too-refined outfit. As you can see here, it's super easy to look seriously stylish and stay snug when chillier weather comes, all thanks to ensembles like this. So if you need style tips on how to dress as you move through your teenage years, this ensemble is perfect.