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 & 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 & is acid-free & archival-safe to provide long-term protection. For clarity, security & strength, it's hard to top these sturdy sheet protectors.