Material: The women posture corrector is made of 85% Nylon and 15% polyester fiber. Soft, breathable and durable for your daily . Features: - The X-style keeps your back straight and comfortable from sitting or standing all day. - It is perfect to be worn underneath your clothes to give your bra an extra uplift. - A wide, elastic bra band keeps everything in place comfortably and firmly. - Women's hunchback posture shape corrector upper shoulder with push up bra chest support.