The Kanaken Therapeutic EX Series was developed with the concept of "how relaxed posture can be maintained in a fraction of the time." A low-density, medium density, and high-density three-layer urethane construction is made using the high-performance "EXGEL" material for a textured finish. The outer material is breathable and has a special shape that enhances the fit and feels great. The bottom of every pillow is non-skid so you dont have to worry about it slipping around. Size (W x D x H): 9.8 x 10.2 x 2.4 inches (25 x 26 x 6 cm); Materials: EXGEL / Urethane / synthetic leather coating