Our 17 x 21 2 mil flat poly bags are the standard weight and the most popular thickness for shipping pars, clothing, food storage and more. All 17x21 2mil polybags are made from low density polyethylene and can be recycled. Our flat open top 17 x 21 .002 plastic bags feature impressive clarity and make storage and organization simple for industrial, food service and medical industry applications. These standard weight plastic lay flat 17 inch by 21 inch bags can be sealed by using twist ties, bag tape or by heat sealing, and they meet FDA requirements for use in food packaging and storage applications.