Work: Ideal for sitting at your desk, or any occasion where you need extra support. Comfy: With cushioned straps for extra comfort, and a waistband for further support. Material: Made using breathable mesh fabric in black. Posture aid: Get a back brace posture corrector, for under or over clothes! Three sizes: M (70-90cm waist), L (80-100cm waist) or XL (90-110cm waist). Designed to: Help train your muscles and spine to return to their natural alignment. Back Brace Posture Corrector | Black | Medium | Living Social