The Industry Standard for Vinyl LP Protection and Storage: Three-Ply, Anti-Static Design for Unparalleled Quality These are the same high-quality inner sleeves we use for our vinyl releases. They are imported, three-ply, anti-static, premium sleeves (similar to rice paper) and work with both LPs and laser discs. Back construction consists of a paper layer sandwiched between two sheets of high-density polyethylene (HDPE) with a translucent HDPE front.