Ultra PRO's revolutionary CardPreserver(TM) protective holders provide trading card security and long-term storage with a built-in, 2-in-1 benefit. CardPreserver protective holders feature a soft front for easy card loading and a rigid back to help prevent damage. These amazing protective holders offer a safe method of archival storage for trading cards based on their 100% acid-free, polypropylene construction. Additionally, these industry-changing protective holders also feature a resealable back to keep your cards in place for full 720° security.