BACKPACK BOYZ : Pink Ztarburzt (Big Al’s Collab) Packaging 3.5 Mylar Bag Items are Non-Refundable and Non-Exchangeable. BACKPACK BOYZ : Pink Ztarburzt (Big Al’s Collab) Packaging 3.5 Mylar Bag In its basic form, Mylar® is a clear material made from polyester resin. The silver effect comes from a lamination to ...