Outer sleeves are protective coverings designed to encase items such as vinyl records, CDs, or books. They help shield these items from dust, scratches, and other potential damage, ensuring their longevity and maintaining their condition. Outer sleeves can be made from various materials, including plastic and cardboard, and often come in different sizes to fit specific items. In the case of vinyl records, outer sleeves are typically made of polyethylene or polypropylene, providing a clear view of the album cover while protecting the record itself. For books, outer sleeves can be used to preserve dust jackets, keeping them intact and preventing wear over time.