Sturdy Poly Bags are perfect for protecting medium to heavy weight products from dirt, dust and moisture Close bags with twist ties, bag tape or by heat sealing. 100% virgin, high clarity polyethylene film. Meets FDA and USDA specifications for food contact. Sizes listed are the inside usable dimensions of the bag. Office Depot (R) Brand 3-Mil Flat Poly Bags, 4in. x 8in., Case Of 1,000 is one of many Poly Bags available through Office Depot. Made by Office Depot.