The Influence of Pillow Material and Shape on Cervical Curvature Stability.

Sleep occupies approximately one third of our life and activity so maintaining good health through good sleep is important.In addition, sleep is necessary to adjust the ability to cognize, judge and memorize required for the activity.The 1 quality of sleep is directly related to the standard of living as well as human health.The 2 quality of sleep is related to the thermal conductivity, height, flexibility, stability, moisture absorbing power, air permeability, temperature, physical mobility, and usefulness of the pillow used and among these elements,