DescriptionDo 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 to way to alleviate your humpback, shoulder and waist pain. It's also the best method to correct your back posture without operation.Features- Color: Black. - Material: Nylon. - Size S: 50-80cm (waist); 60-90cm (breast); 30-40kg (weight); 8-14 (age). - Size M: 60-90cm (waist); 70-100cm (breast); 40-50kg (weight); 14-18 (age). - Size L: 70-100cm (waist); 80-110cm (breast); 50-60kg (weight); above 18 (age). - Accelerate blood circulation of human body by correcting back posture. - Sweat-absorption and breathable for comfortable wearing all day long. - Portable design, solve the shortcomings of traditional back belt. - 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 bad seating and walking habits. Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!