Welcome Our sleeves are made from high quality polypropylene Crystal clear for maximum transparency and clarity and are thicker then most sleeves. Of this type. These sleeves give you a clear View of the album cover without having to remove the album from the sleeve. Our sleeves are resealable and are ideal for swap exchanges, and are great for shops, record dealers, collectors and for archiving. The adhesive strip is on the bag, so that the LP does not stick to it during handling and also eliminates wear and tear . Flexable ans stong and have a shiny glossy finsh when fitted. Foil thickness 90µm, correspond to 0,09mm that is 360 gauge polyroplene. n contrast to polyethylene outer sleeves, polypropylene is characterized by high transparency, rigidity and abrasion resistance. Size is 12 ”for LP, 323 x 323 mm plus 50mm tab. Can be recycled when you renew your sleeves.