Made of Archival Polyester (Mylar) Fits Golden Comic Books 2 mil material thickness 1-1/2" flap for closure
Exterior Dimensions: 8 1/4 x 10 1/2

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.