We spend approximately one-third of our life in bed, and a synergy of psychological, physiological, and physical conditions affects the quality of sleep. Due to an insufficiently adapted sleep system (defined as mattress+support structure+head cushion) and/or incorrect sleeping posture, the human body, especially the vertebral column, is often insufficiently supported; insufficient back support can cause low-back pain, which is one of the most compelling problems in the industrialized world