... . Logo:Can be printed. manipulate :inexpensivesimple & convenient to usethe perfect abdominal training device In view of the sit-ups and back design ... , natural,security,Prevent back injuried , Also more training to a broader range of abdominal muscles. Laying flat equals limited range of motion ... -up,side crunch,reverse crunch,complete core exercise and training for the Abs,back and obliques. AB mat