Our card sleeves are made from glassine, a type of waxed paper. The paper is made with FSC certified materials and is printed with soy inks. Glassine can be composted, recycled, reused, or burned. All of our prints are sealed in protective sleeves made from polylactide acid (PLA). PLA is created from the lactic acid in plants and is certified compostable in municipal facilities only (not approved for backyard composting).