Vibro-tactile Positional Therapy The Night Shift is a clinically proven solution for patients with positional obstructive sleep apnea (POSA) and snorers. Worn on the back of the neck, Night Shift begins to vibrate when the users start to back-sleep. The vibration slowly increases in intensity until the user changes positions. Intelligent Interactive Monitoring Night Shift is also an intelligent, interactive monitor that measures sleep quality and the frequency of unhealthy loud snoring. The internet-based Report Portal enables users to monitor the effectiveness of the therapy and its improvements in sleep quality.