Specification: Item Type: Posture Corrector Material: PE EVA Size Chart: Size Under BustSuitable Height S 50-60cm 19.7-23.6in 100-125cm 39.3-49.2in M 55-65cm 21.7-25.6in 120-140cm 47.2-55.1in L 60-70cm 23.6-27.6in 140-160cm 55.1-63.0inFunction: Make you look confident, strengthen your body, and correct your sitting posture to prevent myopia. Package List: 1 x Posture CorrectorBreathable and sweat-absorbent: The back material of Hunchback Posture Corrector is made of PE material, no large-area fabric, lighter and more breathable. The shoulder pads of Clavicle Support Brace are made of lightweight, breathable and hygienic materials, which are silky soft and breathable, breathable and sweat-absorbent. Comfortable to wear every day. Back support: Posture Corrector strengthens back support, prevents hunchback and spine bending, relieves spine, neck, and back pain, allows you to maintain a natural straightness, relieves muscle fatigue caused by poor posture, and reduces the key parts of the body by correct posture adjustment. Ergonomic design: Back Straightener's adjustable double elastic band under the arm is ergonomically designed to ensure a comfortable fit. Just pull or loosen the Velcro straps for a comfortable fit and optimal posture to provide flexible support for the waist And reduce the pressure on the waist, so as to provide you with a experience. Can be worn inside and outside: Upper Back Brace can be worn under clothes, stick to the skin, will not fall under clothes, suitable for daily use. The breathable posture corrector fits the body well and maintains the correct posture, whether it is worn outside or inside. Our posture correctors help maintain alignment during sitting, standing, lying or other daily activities. Full shoulder extension: Shoulder Upright Support Trainer can force the shoulder to fully extend, improve bad habits, and reduce shoulder pressure. Correct your posture in the most comfortable way to relieve chronic back pain and make long hours of work or standing a breeze. Our posture corrector can even help solve long-term bad postures.