Ultra PRO 9 Pocket Pages are the premier choice of collectors, and provide the ultimate protection for all types of trading cards. Made of high clarity, archival safe polypropylene, Ultra PRO 9 Pocket Pages contain no PVC, and are Acid Free. Unlike vinyl pages, Ultra PRO 9 Pocket Pages will not yellow or crack over time. Plus, Ultra PRO pages are strong, durable and will not damage your valuable trading cards.
So if it's worth protecting, it's worth Ultra PRO