Authentic Bamboo Fibers knitted throughout a stretch knit pillow casing. 43% Bamboo Fibers to be exact. This means cooler feel on your skin. It’s a plush pillow with a proprietary mix of fine-mill, 3 lb cool gel, Certi-pur visco mixed with super-soft comfort-blend. Fluffable. Scrunchable. Foldable. and finally, Huggable.