Ultimate Guard Large Manga Cover (25) Extra high clearness The extra high clearness of the material ensures a genuine image quality with unaltered contrast and colors Acid free - No PVC This product is completely free of PVC and acidic materials and therefore ideal for protecting comics 100% archival safe Keeps your comics safe and preserves the value of your collection during permanent storage Self-adhesive closure Keeps your mangas securely sealed during transport and storage, while giving you an easy access when needed Self-adhesive closure