Each of these Pre-Opened Bags on Rolls are made of 100% virgin Low Density Polyethylene (LDPE) resin that meets FDA/USDA specifications. Manufactured with a durable bottom seal and extra strong side seal, this premium bag features superior clarity through the back of the bag to show the quality of your customer's products. All listed gauges are nominal. Can be heat sealed, tied, stapled or taped shut.