Sizes: Choose from Small: 95cm x 24cm, Medium: 105cm x 24cm or Large: 120cm x 24cm. Corrector belt: Get this breathable posture corrector belt! Material: 80% polyester + 20% steel. Posture: Use this belt to correct and realign your posture after sitting at a desk or driving for a long time. The steel plate support corrects your spine and reforms your posture! Breathable: Made from comfortable and breathable material. Breathable Posture Corrector Belt | Black | Living Social