An overwrap or wrap is applied over an item or is applied over another form of packaging. It is often made of plastic film (sometimes called Polywrapping) or paper. ==Functions== An overwrap can have several purposes or functions: ==Types of overwraps== ===Shrink wrap=== Shrink wrap is a material made up of polymer plastic film. When heat is appli... Found on http://en.wikipedia.org/wiki/Overwrap