The answer to the crossword question “Toilet paper layer” is PLY. This refers to the number of layers or sheets of toilet paper that are stacked on top of each other. The more layers, the thicker and more absorbent the toilet paper will be. PLY is a common term used in the toilet paper industry to describe the quality and thickness of the product. So, if you’re ever wondering how many layers of toilet paper you need, just remember the term PLY!