Simon Porte Jacquemus' fall collection, "Le Sport 90," is le look for the modern girl on the go. Mini pinstripe jumpers are perfect for a business meeting or dashing out to meet friends, and boxy Day-Glo tops and PVC skirts are just the thing for running from the office to the gym. With straight-cut men's suiting and silver plastic, Simon taps into what it meant to be modern in the pager era, and in turn makes something totally new for now. Best worn with sneakers, socks, and no makeup, the pieces are on hand to give you moody Parisian charm. Check out the lookbook here—like everything the 22-year-old designer does, it's enviably French and cinematic.