Comic book bags are protective sleeves designed to keep comic books safe from damage. Made from materials like polyethylene or mylar, these bags help prevent wear and tear, moisture, and dust from affecting the comics. They come in various sizes to accommodate different comic book dimensions, ensuring a snug fit. In addition to bags, many collectors use backing boards, which are stiff cardboard inserts that provide extra support. Together, comic book bags and backing boards help maintain the condition of comic books, making them essential for collectors and enthusiasts who want to preserve their collections.