Plastic Bags are manufactured from polyethylene and are requested mostly in clear poly. Poly film and plastic bags come in assorted colors and are available in different styles. The styles differ depending on the use and application. Ziplock bags or resealable bags are known as food bags or sandwich bags but are used in many industries. The mil thickness required you choose has to do with the content weight and the handling which will occur when using the bag. Shop our assorted style of bags below to find the best size.