PROVIDES SUPPORT: exercise mat is comfortable, and the arch design naturally curves to the back, allowing for more effective while protecting your lower back and tailbone, providing stability, and constant tension. PREMIUM WORKOUT EQUIPMENT: Great for those with lower back pain problems who want a safe way to continue strengthening their abdominal muscles. The Abdominal Mat will not hurt your lower back making this your most effective . HIGH QUALITY MATERIAL: The Ab exercise mat made of PVC, EPE, compact, comfortable and durable for long term service. Foldable design, easy to store, and you can easily take it anywhere. WIDE APPLICATION: This sit up great support for training abdominal, back, oblique muscle groups during crunches, leg lifts & sit ups and provides stability & constant tension PROVIDES FULL RANGE OF : and the perfect amount of firm support for your back and spine while providing a challenge to your core muscles. Specification: Material: PVC Size:Front arc aera 37307cm/14.5711.812.76inch, flat aera 37302cm/14.5711.810.79inch Package Includes: 1 Ab Mat