The Posture Corrector back brace is designed to help you train your body to achieve proper posture. The posture trainer reminds you when you are slouching so you can focus on better posture. ALL-DAY COMFORT - Wear the posture corrector comfortably all day long. We recommend wearing it over an undershirt or t-shirt. Chances are you will forget you are even wearing it. The breathable nylon fabric stays dry and comfortable while remaining flexible and discreet. High-quality, double-stitched materials are used to ensure this posture corrector lasts. UNISEX - Both women and men can wear the posture corrector, which easily adjusts to fit any body type. INVISIBLE UNDER CLOTHES - The ultra-flat design hides perfectly under t-shirts, dress shirts, and blouses.