Applying the Sacro-Occipital Technique (SOT) principle widely known as a healing technique, the DANANDA functional pillows are embedded with the C- curve supporters, having excellent bearing capacity to maintain a C-curve (35 degrees), which is the normal angle of the cervical vertebrae at a state of lying down. As such, this product provides a comfortable sleeping environment and helps to correct unbalanced cervical spines (neck) during sleep, thereby helping to prevent forward head posture, turtle neck and cervical disc herniation in the neck caused by the popularization of smart phone and bad postures. Currently, our product is for sale in Naver Store Farm, Open Market,  G Market, Auction B2C Market,  etc.