The best raw plastic material available for permanent protection and storage! At 4 mil, these are the thickest Mylites available that are resistant to aging, decomposition, moisture, oxygen, and gas penetration. They are not affected by fungus, mold, or mildew; and immune to insect and rodent attack. The fold-over flap can be tucked in or taped closed. Sold in packs of 100. Measures 7 3/4" x 10 3/4".