If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user
From SKYbrary Wiki
High level, white patches, filaments or narrow bands of cloud with a fibrous or silky appearance. Because of the high altitude, and therefore low temperature, cirrus clouds are composed of ice crystals rather than water particles. Viewed from the surface, because of the distance from the observer, cirrus clouds appear thin and wispy.