Cellophane noodles, or fensi (simplified Chinese: 粉丝; traditional Chinese: 粉絲; pinyin: fěnsī; lit. 'flour thread'), sometimes called glass noodles, are a type of transparent noodle made from starch (such as mung bean starch, potato starch, sweet potato starch, tapioca, or canna starch) and water. A stabilizer such as chitosan (or alum, illegal in some jurisdictions) may also be used.