Our pillow covers are made from rayon from bamboo to ensure extreme breathability and softness. It's filled with high-quality shredded memory foam as you can see on product pictures. It’s soft, conforms to your head, and rebounds quickly to retain its shape. Our shredded memory foam pillow provides good support for your neck, shoulder, and upper back muscles throughout the night. They are supportive enough for sleepers of all styles (back, stomach, and side sleepers), weights, and body types. Our pillowcases with zipper openings on the inner liner allow you to adjust to a suitable height and volume by removing or adding the shredded memory foam. Also with this zippered design case, you can remove the pillowcase to clean and wash.