I really like this assortment of sanding sheets. They use some type of plastic backing not paper. They work wet or dry and have a very convenient size. I have had the for a month and use them primarily on car and truck models for surface finishing. I have also cut a few up and attached them with double sided foam tape to to plastic angle pieces for sanding in awkward places and the sanding film works great.

Plastic back not paper. Easy to cut to size wanted to use.