The Yes4All Ab Exercise Mat Abdominal Wedge is designed to support your lower back while working your abs. It features a 30-degree arch to follow the contour of your back, providing stability and constant tension during crunches, leg lifts, and sit-ups. Made from high-quality support foam with a non-slip PVC cover, this mat is durable and maintains its shape after repeated use. Its lightweight and portable design make it easy to carry and store, making it ideal for use at home, in the gym, or at the office.