Sturdy Poly Bags are perfect for protecting medium to heavy weight 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 3 Mil Flat Poly Bags 30in. x 48in., Box of 100 is one of many Poly Bags available through Office Depot. Made by Office Depot.