Low-density polyethylene, or LDPE for short, is a type of thermoplastic made from the monomer ethylene. Because it is reasonably translucent, flexible, and durable, this type of plastic is frequently used in film applications. Cleanroom LDPE 6.0 mil clear polyethylene. Bags are available in a variety of sizes. Double bagged packaged, sealed with 100 bags per pack. Custom sizes are available for custom runs.