Yes4All Abdominal Mat, Abdominal Wedge &ndash; Sit Up Support Pad for Full Range of Motion Ab Workouts &ndash; Ab Exercise Mat (Black) 15-INCH LENGTH x 12-INCH WIDTH x 2.75-INCH HEIGHT: One-size-fit-all Abdominal Mat supports you lower back while working your abs; portable design to carry to the gym or even while travelling HIGH-DENSITY FOAM WITH DURABLE PVC COVER: Constructed of high-quality foam will not tear, flatten or lose shape after repeated use, while non-slip PVC cover provides a firm grip surface to practice on CONTOURED 30 DEGREE ARCH DESIGN: Specially designed with thicker on one side and more sloped on the other to follow the contour of your back and provide perfect support during your workout, thus prevent injury FULL RANGE OF MOTION: Ideal to work out a full range of motion targeting the entire Abdominal, Back, and Oblique muscle group during crunches, leg lifts & sit-ups and provide stability & constant tension 2-YEAR WARR AND 60-DAY RETURN: Our Abdominal Mat stands up to 2 YEAR warr or if you think its not for you, contact us within 60 days of purchase