About This Triple-Layer Protection – Each sleeve is constructed with three layers of high-density polyethylene (HDPE), including an enclosed rice paper insert, providing superior protection against dust, scratches, and static. Archival Quality & Acid-Free – These sleeves are acid-free, ensuring long-term preservation of your vinyl records without the risk of damage or degradation over time. Enhanced Durability – With a total thickness exceeding 3 mils and an additional 21# rice paper layer, these sleeves offer extra stiffness for easy record insertion and long-lasting durability. Flush Cut with Lip for Easy Handling – Designed with a slight lip, making it easier to insert and remove records while maintaining a secure fit to protect your vinyl. (300-Pack) Bulk Protection – Includes 300 inner sleeves, offering an economical solution for collectors, record stores, and archivists looking to protect large vinyl collections. Overview Material : High Density Polyethylene (HDPE), Rice Paper Brand : Square Deal Recordings & Supplies Color : Clear Style : Classic Max Input Sheet Capacity : 1