Product Detail PACKAGE:10PCS/CTN MEAS:64.5X35X51CM WEIGHT:13/12KGS 6 second Abs is up to 15 times more effective than a regular crunch. It"s well known that regular crunches use gravity as resistance, but the 6 second Abs resistance bands provide a more effective workout. 6 second Abs can also target specific muscle areas, while crunches done on the floor are limited. Get the 6 second Abs with 5 levels of resistance up to 55 pounds, the...