A boa can be made of
fur, but it is usually made instead from various types of
feathers.
Ostrich,
marabou stork, and
turkey are the most common feathers used, although non-feather boas are also available. The feathers go through bleaching or dyeing processes and are glued and stitched into lengths called "ply". Sometimes more natural boas are produced. A lightweight chandelle boa might only weigh , whereas a 24 ply ostrich boa can weigh as much as . The more ply, the fluffier and thicker the boa. Boas are generally measured by weight (grams), length (centimetres), and ply. Boas are available through novelty, costume, or lingerie shops, as well as online. With the development of "fun fur" or "eyelash" yarns in the late 20th century, an adept craftsperson can knit a boa of one solid color or a mix of various colors. Yarn boas do not "shed" like feather boas and are favored for their soft texture against the neck. The rounded boa shape is achieved by
knitting one row and
purling the next row, then repeating this pattern until reaching the desired length. ==Types==