Natuworld Teenagers Young Adults Posture Corrective Brace Back Shoulder Spport Band Belt Color Random Material: polyester,nylon and cotton. Size:about 16.7*12.7cm. Comfortable, Invisible Under the Clothes, Light Weight. Easy to Put On, Pull off and to Carry Around. Posture Corrector is Rated #1 Posture Corrector for Children, Teenagers & Young Adults. Color will ship by random.