Premium Memory Foam: 3 to 5 second rebound high density memory foam. Ergonomic design that provides health support to your neck, promotes muscle relaxation,helps to eliminate neck, head shoulders and back pain.   Removable zipper Pillowcase: easy to take off and machine washable outer pillowcase made of soft, and breathable fabric with mesh sides that provide cooling feeling. The breathable inner cover extends the life of the memory foam core effectively.   Personalized Height: Our contour cervical pillow has two levels/sides to support your neck naturally which provide customized fit for side, back, or stomach sleeper. Measurements 24” x 13.4” x 3.5”/4.8” ( L x W x H)