Pinit Marvel Poster Sleeve. 22-1/4 x 36" 2 mil Polyethylene. No flap. SKU: SMP (0)No Reviews yet Add to Shopping Cart Details Polyethylene Details Back DetailsPolyethylene is a soft clear material that has some give to it. It has excellent contact clarity. Our polyethylene is made from 100% pure-virgin material. Use for Long-term storage. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review