This pairing of a crew-neck sweater and olive shorts is clean, on-trend and very easy to recreate. And if you need to instantly dial down your look with one piece, why not complement this outfit with a pair of black and white athletic shoes? This outfit is also great if you're looking for summertime wear to make a slow day more bearable. Wondering how to perfect casual outfits during your teen years? This combination is a perfect example.