Go no further than rubber and plastic and what do you envision? If you guess an exercis strap then you're right on! It is all in the modularity of the device and creativity of the workout. Said another way, try to think about how many different ways you can wrap this thing around something and pull on it... That's just about it. From squats to upright rows to lat pull downs to shoulder presses, this thing does it all! For the weary traveller, an even better tool - small, lightweight and can be used to fling water ballons from hotel rooms ;0 Get yours today!