works great for thin and thick hair [SEP] i have got thick curly hair which falls to my hips and my seven year old step daughter has thin hair falling to the small of her back and we are both very happy with this product it fits on both of our heads comfortably i was worried it would be too big for a childs head but it works perfectly for both of us the elastic is tight enough that our hair does not fall through and it is large enough to hold all my hair unlike the transparent plastic ones you can get in the drug store which are always too small to cover my whole head of hair