What does Sanding (also Emersing) mean?
A finishing process on denim where the denim is sanded to give a smoother feel.
Heddels explains Sanding (also Emersing)
Sanding is a finishing process used on denim to soften it and give it a worn look. It can be done by hand with sandpaper or using commercial sanding tools such as a sandblaster. The final effect can be quite subtle or very extreme, depending on the length of the sanding process. Jeans that have been sanded tend to emphasize the body’s curves.
Here is an example of denim being sanded: