Mylites+ Standard Comic Book Mylar Sleeves 7 1/4" x 10 1/2" Plus 1 1/2" Flap These are the lightest and most affordable comic sleeves made entirely from Mylar! Resistant to aging, decomposition, moisture, oxygen, and gas penetration. Not affected by fungus, mold, or mildew. Immune to insect and rodent attack. The fold-over flap can be tucked in or taped closed.