Do you seat all day long at office or school? Do you feel tired on your neck and shoulder all the time? This is the most simple and easy way to alleviate your humpback, shoulder and waist pain. It's also the best method to correct your back posture and make a better look breast shape without operation. Features - Color: Black. - Material: Polyester. - M: 130-160cm (Suitable Height); 25-37.5kg (Suitable Height). - L: 150-165cm (Suitable Height); 37.5-45kg (Suitable Height). - XL: 155-175cm (Suitable Height); 45-55kg (Suitable Height). - XXL: 160-180cm (Suitable Height); 55-62.5kg (Suitable Height). - XXXL: 165-185cm (Suitable Height); 62.5-80kg (Suitable Height). - Accelerate blood circulation of human body by correcting back posture. - Breathable for comfortable wearing all day long. - Adjustable tape for better fit your body. Provide support for your breast for shaping more sexy chest. - Decrease your shoulder and waist pain caused by seating for a long time. Correct your posture and shape a nice-looking figure. - Suitable for workers, teenagers, housewife and other people who have inaproprate inappropriate seating and walking habits.