Yes4All 15.2″ Ab Exercise Mat With Tailbone Protecting Pad, Abdominal Wedge for Abs Workout, Sit Up, Lower Back Support and Stretches Ab Muscles

Amazon.com Price: $17.99 (as of 01/03/2023 02:28 PST- Details)

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28. 5-INCH LENGTH x 12-INCH WIDTH x 2.75-INCH HEIGHT: One-size-fits-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