I had never really used lifting bands before buying them, but i seen them in a few of my workout videos and decided to make the purchase. These Black mountain lifting bands have 5 colors starting pretty easily, that get more stiff as you move up. When you get to #5, you can add the #1 to it to create #6. Some huge beast might be able to use 3 or 4 bands together to create a massive rubber resistant band but it would be very awkward to use.