1Provides support for the shoulders and back, helps prevent hunchback and spinal curvature. 2Helps to balance the pressure on shoulders, back, relieve muscle fatigue, reduce shoulder and waist pain. 3Adopts quality fabric, soft and elastic, skin friendly and non-irritating, comfortable to wear. 4Help form correct sitting position, protect eyesight, prevent myopia. 5Tightness adjustable, you can regulate it according to need to increase comfort level.