Patented 360° ERGO-SMART© FLATBACK Shape: Relieve the pressure on the back of neck, reinforce the support on both sides of your neck. 3 front buttons allow you to adjust your pillow to fit perfectly to your neck contour.Pressure sensitive memory foam rebounds in 3 seconds.The signature reusable heat patch activates on the shiatsu point on the back of your neck.A neck pillow is like a mattress, we want to give you choices to pick the foam density that best suits your needs.Comes with its own compact travel pouch that allows you to reduce the pillow size in half.