The best raw plastic material available for preservation and storage! These are the lightest and most affordable comic sleeves made entirely from Mylar! Made from 1.4 mil. thick Mylar type Melinex 516 or Equivalent. Naturally resistant to aging, decomposition, moisture, oxygen, and gas penetration. Features 1 " fold-over flap that can be tucked in or taped closed. Sold in packs of 100. Measures 7 x 10 1/2.