These archival quality crystal clear sleeves are a great choice for protecting your precious Treasury comic collection. The special adhesive used on this sleeve allows you to open & reseal the comic many times, keeping your comic safe and dust-free. The adhesive strip is located on the body of the bag - keeping your comics safe during insertion and removal. Biaxially Oriented Polypropylene (BOPP) means a much better sleeve clarity than the traditional cast polypropylene or polyethylene. PVC Free. Fits Treasury Comic Books Acid-Free, Static-Free, Archival Quality BOPP PVC Free Crystal Clear Ultra Premium 2mil Thick 10-1/2" x 13-1/2" + 2" Flap with Resealable Strip