Matte Standard Deck Protector Sleeves White Color are an acid free, archival quality product that is designed to protect your valuable cards and help obscure the backside. The Matte Deck Card Protector Game Card Sleeves White Color are made of two panels of archival-safe polypropylene: one panel is glossy-clear and the other is solid white These sleeves fit perfect inside a regular card sleeve doubling the protection on your card and making the combination virtually waterproof