Microring extensions, also called i-tip extensions, are attached to the hair with a ring. No heat is involved and it is less damaging to the hair than flat tip extensions. The top is made in an I-shape and consists of a keratin layer. This layer is flexible, so that it will be squeezed with the pressing of the ring during attachment. This means that it is better fixed, less likely to sag and is finer in the hair.