Yes4All Abdominal Exercise Mat with Tailbone Protecting Pad &ndash; Full Range of Motion Ab Workouts 28.5-INCH LENGTH x 12-INCH WIDTH x 2.75-INCH HEIGHT: One-size-fit-all Abdominal Mat with a bonus anti-slip tailbone supports your lower back while working your abs; portable design that can be folded for storage convenience WORK OUT ENTIRE CORE & GET FULL RANGE OF MOTION: Ideal to work out a full range of motion targeting the entire Abdominal, Back, and Obliques muscle group during crunches, leg lifts & sit-ups and provide stability & constant tension PREMIUM QUALITY WORKOUT EQUIPMENT: Durable and high-quality support foam will not tear, flatten or lose shape after repeated use, while the non-slip PVC cover provides a firm grip surface to practice sit-ups, crunches, stretching effectively COMFORTABLE CONTOURED DESIGN WITH TAILBONE PROTECTOR: 30 degree arch is designed to follow the contour of your back & avoid injury; while attached foam pad protects your tailbone from abrasion and prevents the abdominal mat from slipping away during sit-ups BACKED BY OUR 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 and receive your money back within 60 days of purchase