The rigid PVC used in the BCW comic toploaders contain no plasticizers or stearates.  The high quality PVC does not migrate and will not harm your comics, photos or prints,...

This is for a pack of BCW Current/Modern Comic Mylar Archivals - 4 MIL 25 Mylars per pack. These 4 mil Comic Book Bags are made of Archival Polyester (Mylar)...