Review (4/5): They work for me!
I wasn't totally sure what to expect. These are like a foam/nylon material outside and what seems like a bendable wire/metal inside. You have to open the middle slit a bit to pull your hair through, but you can push it back together easily. I have medium length very fine hair and I use the smaller size. My 7 yr daughter has very long hair (normal thickness) and I use the larger ones on her. I've even given her Princess Leia buns!!