These bags with their trademark 'S'-shaped flaps, "ease in" comics, holding them tightly to protect edges and corners. The flaps are 2" high, and do not fold over. The sleeves are made from pure 4 mil. thick Mylar; naturally resistant to moisture, mildew, acids, insects, rodents, mold, and decomposition.

Mylar plastic is the ultimate permanent preservation device and is specified by libraries and preservation experts around the world !