(Set of 2) The Adjustable Pillow comes in three different thicknesses to accommodate different sleeper types. Each pillow is stuffed with shredded memory foam with polyester fiber mix. This combination gives the pillow an overall more huggable and shapeable surface for your head, neck, and shoulders. An extra foam storage bag is provided with all three pillows to collect removed stuffing as you customize your pillow’s height and feel. The outer cover has two different sides. One side offers cooling, while the other is a standard non-cooling fabric for ultimate usage optionality