Leave it to Paris Fashion Week street style to make you want to add a geeky argyle sweater to your fall sweater rotation. This past week in the City of Light, street style stars aced autumnal fashion, stepping out in playful interpretations of prepster-inspired looks-with masks included, of course. There was no shortage of pleated minis and sweater-vests, check print and houndstooth, as well as plenty of polished poplin shirt collars under sweaters and coats.