Keep dirt and spills off important papers with these Staples heavy-duty sheet protectors. Protect papers without sacrificing readability by using these Staples heavy-duty sheet protectors. Each sheet protector is three-hole punched, making it convenient to insert them into a standard three-ring binder, and the PVC-free, acid-free and archival-quality material ensures that documents are kept safe even when in long-term storage. These Staples heavy-duty sheet protectors are sealed on the bottom and sides to prevent papers from slipping out.