Get Full Range of Motion - Fitness mat designed for ab workouts. This premium, high-density ab trainer workout mat with tailbone protector provides stability , constant tension , and a full-range of motion which regular crunches do not provide to help you get that six pack abs and a flat stomach Work Your Entire Core - The ab exercise mat isolates the abs and takes the hip flexors out of the equation so that you can do perfect situp reps. Our quality fitness equipment provides complete isolation of your abdominals during crunches , leg lifts and sit-ups. This workout equipment for abs will not hurt your lower back making this your most effective abs workout