Mega-stylist to the stars, Karla Welch is here to guest-mentor the designers and sheโs got a job for them โ dress her client: the one and only Karlie Kloss! Karlaโs got a twist though, the materials used to design the look will be donated clothing from a local Goodwill, making this Project Runwayโs first upcycling challenge. The designers will need to be resourceful, sustainable, and fast because itโs also their first one day challenge. One designerโs dreams will come true with the chance to dress a supermodel while another will be all out of second chances in this second-hand challenge.