If you're looking for tip-top protection for your documents, look no further than these Diamond Clear Secure Top Sheet Protectors. Each three-hole punched sheet protector features a convenient top flap that secures the contents so you can store papers in nonstandard sizes with confidence and rest easy knowing your important document won't accidentally slip out of its protective sleeve. Super-heavyweight polypropylene is designed to withstand frequent use in your binder and is acid-free and archival-safe to provide long-term protection. For clarity, security and strength, it's hard to top these sturdy sheet protectors.