Meh
These root-lifting rollers clamp snuggly into place, thus the 2 stars.  The results have not lived up to expectations, however.  Even when using with slightly damp hair or styling products and a hair dryer the root lift is minimal and not at all lasting.  I tried these with medium short hair on top/front and again after a pixie cut.  I get better results with root lift spray, a round brush and using a hair dryer with cool shot.  Glad they are recyclable.
Rating: 2 stars