Relieves shoulder and back pain: Wearing a posture vest helps align and straighten the spine and relieve pressure on the neck, back, and shoulders. Improves posture and well-being: The posture corrector can help you maintain an upright posture, reduce hunched back and neck pain, and alleviate discomfort in the neck, shoulders, and back. Invisible aid: Choose your size based on your height and weight. The posture corrector shoulder support can be worn under clothing and will not show. Ease of use: Adjust the posture corrector to the desired fit. Wear it like a backpack with the Y-shape facing up. Adjust and tighten the straps as needed. Specifications: Color: Black Material: Neoprene Size: L, Weight range: 80–110 kg, Height range: 175–190 cm Size: M, Weight range: 50–80 kg, Height range: 160–175 cm Package includes: 1 posture retention vest