6 layers of 250 gsm bamboo terry.  Super slim and absorbent, fits in a fully extended Middlest pocket or in our Maximest sized pockets.   
Bamboo terry is very pliant and will easily fold over if needed.  
Minimal shrinkage due to the material composition and is approximately 16.25” long after being washed 3 times in warm and dried on medium heat.  
This listing is for a single insert.