Most popular used Poly Bags for general light to medium weight products to protect them 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. Office Depot Brand 2-Mil Flat Poly Bags, 30in. x 40in., Case Of 250 is one of many Flat Poly Bags available through Office Depot. Made by Office Depot.