Comic book bags are protective sleeves designed to store and preserve comic books. Made from materials like polyethylene or mylar, these bags help prevent damage from dust, moisture, and physical wear. 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 and help maintain the comic's shape. Together, comic book bags and backing boards are essential for preserving the condition and value of comic books over time.