THIN FLAT POLYESTER BED PILLOW. THE THINNY IS ABOUT 2" THICK, IT IS FAIRLY SOFT AND IS MADE FOR STOMACH SLEEPERS , BACK SLEEPERS, AND PEOPLE WHO SIMPLE LIKE A THIN PILLOW. IT HAS A ZIPPER WHICH MAKES IT CONVEINIENT TO SIMPLY REPLACE THE INTERIOR IF IT IS WORN. WE SELL THINNY REPLACEMENT FILLS (JUST THE INSIDE) SEPERATELY.