Drafting film is a polyester film with a one or two side matte translucent drawing surface. It is archival and it will not tear or yellow. You can easily transfer drawings to it because it is transparent. The isn't any texture that is found on papers, because of this you get a more intense color. Drafting film comes in different sizes, but the most popular one for colored pencil work is the .005
Dura-Lar is a combination of Mylar and Acetate. It is heat resistant, will not tear, absorb moisture or discolor. It is acid-free and archival.
Yupo is not considered a drafting film, it is a synthetic paper, machine-made of 100% polypropylene. It is waterproof, stain resistant, strong and durable. Yupo has a smooth finish and is pH-neutral. It is also available in pads