BCW Silver Mylar Comic Book Bags (4 mil) - Pack of 25

These 4 mil Comic Book Bags are made of Archival Polyester (Mylar) an inert material of the highest clarity. Mylar will not discolor, damage, or adhere to items placed inside it. It is a sturdy film that beautifully displays, timelessly protects and gives extra support to fragile documents. Resistance to moisture, insect attack, fungus, mold, mildew, acid, oils, grease, and solvents. Mylar contains no dangerous plasticizers, slip additives, surface coatings, antioxidants, acid- hydrolysis. This bag is a semi-rigid bag and does not require the use of a backer board. But if you do use a backer board be sure to only use certified acid free boards. Made of Archival Polyester (Mylar) Fits standard Silver Age Comic Books 4 mil material thickness Crystal clear Protects for 100's of years Strength is 10 times that of polyethylene Use with BCW Current Extenders 1 1/2 inch flap for closure Exterior Dimensions: 7 1/2 x 10 1/2