The BCW Treasury Comic Book Bags are designed to store and protect comic books with a thickness of 2 mil. These clear poly sleeves feature a resealable closure to keep your comics secure. Made from acid-free polypropylene material, these bags are compatible with treasury-sized comics and are manufactured in the United States. With a capacity of 100 comics, these bags are a practical and high-quality solution for storing and preserving your comic book collection.