SAFE Brand Heavy Weight Philatelic Sleeves -- US Covers

SAFE's heavyweight (10 mil), archival philatelic sleeves are crystal clear. They are made of polyester and are 100% free of plasticizers (softening agents) so your philatelic collectibles will not get discolored or curl. The sleeves are closed on three sides with an opening at the top (long side). Sold in packs of 100 sleeves.
Size: US Covers (7 1/4 x 4 1/8 inches)