Contrast Posture Trainer Upgrade Unlike other posture braces, our improved posture corrector with 2 strong support bars which can fully support your back. It not only improves your back and neck posture, but also tightens your waistline. Comfortable and adjustable: It has 2 breathable and movable shoulder straps which are light and comfortable. you can put the shoulder pads under your armpits so you don't have to rub your armpits when you wear them. If you feel tighter while wearing it, you can adjust the 2 small belts and waist belt for a comfortable wearing position. 3 sizes optional: 3 sizes optional from 50 to 100 cm. It is suitable for women, men and children. And it is suitable for office, work, school, reading, housework, etc. (Please refer to the size information to choose the right size for you.) Back Pain Relief: Poor posture can lead to neck or shoulder pain, back pain, osteoporosis, scoliosis, sagging shoulders and sagging. Wearing this back posture corrector for 15 to 30 minutes twice a day will help you maintain good posture! Our Guarantee: If there is any problem, please contact us, ourCustomer service will get back to you as soon as possible.