The correction has the latest inductive design. When the user's back is bent more than 25 degrees, the back reminder will automatically sense and immediately activate the vibration alarm; When your shoulder is bent forward and the tension is abnormal, the sensor will immediately vibrate to remind. The high-elastic nylon shoulder strap is easy to adjust. The shoulder strap is made of porous mesh, which is breathability without sultry. Won't dig into your armpits, hurt your skin, it is comfortable and provides all day wearability. We recommend that users wear the posture corrector for 2 hours per day. 21 days is the period of habit formation, and posture will be significantly improved, 90 days of persistence will enter the period of habit stability. The correction process is not easy, this corrector is great choose for promoting a long term muscle memory.