This WearBands Training System comes with 3 resistance levels compatible with anyone of any size or fitness level. Variable Resistance Bands Training allows for greater levels of resistance the more the band is stretched. WearBands deliver completely unrestricted, no-impact dynamic resistance to any activity or workout of your choice with no limitations. By simply adding WearBands to your favorite workout or activity, you will activate more muscles for a longer period of time, resulting in more strength and physique gains, more calories burned (over 30%), and more cardio benefits in less workout time. Lightweight and portable, they can be used anywhere; at home, outdoors, at the gym, in a class, and while traveling.