Elkay Plastics Gusseted bags feature creased sides that expand to accommodate bulky items. Low-Density Polyethylene (LDPE) bags are the most commonly used plastic bags because they provide excellent protection and outstanding value. Elkay Plastics TUF-R bags are made from a special blend that allows a lighter gauge than polyethylene bags, but both are made from virgin materials, complying with FDA requirements for food applications. Cases and inner packs of the poly bags are barcoded and clearly labeled for easy identification.