Economical light-weight Poly Bags protect products from dirt, dust and moisture Bags are manufactured from 100% virgin, high clarity polyethylene film. Meets FDA and USDA specifications. Close bags with twist ties, bag tape or by heat sealing. Office Depot Brand 1 Mil Flat Poly Bags 9in. x 9in., Box of 1000 is one of many Poly Bags available through Office Depot. Made by Office Depot.