Our ISO-PEDIC™ memory foam pillows can be compared to the TEMPUR-PEDIC® pillows. In order to help relieve and prevent pain your pillow should fill the space created at your neck between your head and shoulders. Because the ISO-PEDIC™ material is temperature sensitive, the pillow will actually respond to your body heat and weight to mold to the natural curving of your head and neck, thereby aligning them with your spine.