Why does the datasheet have Balloons listed under both Plastic and Rubber items?

Balloons can be made of either rubber or plastic. Plastic (Mylar) balloons have a seam and are made of a metal (foil) coated plastic such as polyethylene or nylon. They usually have a shiny, reflective surface and oftentimes have designs with pictures and/or words. Latex balloons are the traditional ‘party’ balloons. They are also often used at festivals, open houses, sales, mass balloon releases, etc. These balloons are made of natural or synthetic latex, are usually round or oval in shape, and can come in a variety of colors.

Note: The Rubber "Balloons ‐ Latex" debris field was added to datasheet Version 2.0 (March 2016).