These 4 mil Comic Book Bags are made of Archival Polyester an inert material of the highest clarity. Mylar will not discolor, damage, or adhereto 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 or extenders be sure to only use certified acid free boards. - Made of Archival Polyester (Mylar)
- Fits standard Silver Comic Books
- 4 mil material thickness
- 1 1/2 inch flap for closure
- Crystal clear
- Protects for 100's of years
- Strength is 10 times that of polyethylene
- Use with BCW Silver Extenders

Dimensions
- Size 7 1/2 x 10 1/2