Acclaimed as the best pillow material in the world, latex foam derived from sustainable rubber trees makes up the filling of this comfortable Z pillow. The milky sap tapped from these tropical trees is converted to a soft, resilient foam. The shredded latex pieces combine to offer a traditional pillow feel that is both resilient and comfortable. Unique foam consistency provides superior pressure relief and can eliminate sleeping pain. Shredded latex provides excellent airflow and sleeps cool. As an added benefit, latex is naturally hypoallergenic and dust mite resistant. Closest to your skin is a super soft cover made of rayon from bamboo velour (75% polyester, 25% rayon from bamboo) that is breathable and sleeps cool.