The Crinoline is a lightweight, plain weave, stiffened fabric with a low yarn count (few yarns to the inch in each direction). During past centuries (especially 1800), Crinoline was even a peculiar under-garment for female apparel: basically a rounded rigid skirt, made by flexible sticks (in wood or other materials) crossed together in order to form a sort of cage, to put under skirts in order to make them wider and wider.