7-foot-long stretch bands that come in rainbow colors; red, orange, yellow, green, blue, purple, in rainbow order. Each 7 foot band is closed with a light-weight buckle This allows you to increase the size of your stretch band simply by adding on another 7 foot stretch band! You now can go from one class to the next class, adding or removing a band as you need. You can even separate the bands into small groups if need be, quickly and easily during class. They can be used not only in a circle but in a straight line as well!