Dear Dee in the Dessert: yes these will "work" on any type of hair. The real question is what do you want to accomplish? If you want an all day set and your haid has some natural body these will work well. If you do not have body then these will not magically impart body to your hair all day.
They are soft to sleep on, the satin covers are kind to hair, and if you mist your hair before rolling you will get the best result. But you can not set wet hair and blow the hair dry, you have to wait for the natural evaporation, so overnight is best. The locking gripper can be a pain, it often seperates, but normally you can snap it back on and you are good to go! The little case is convenient for keeping everything together. You may want to invest in a satin sleep cap also.