Chiffon is a lightweight, balanced plain-woven sheer fabric, or gauze, like gossamer, woven of alternate S- and Z-twist crepe (high-twist) yarns. The twist in the crepe yarns puckers the fabric slightly in both directions after weaving, giving it some stretch and a slightly rough feel.
Early chiffon was made purely from silk. Under a magnifying glass, chiffon resembles a fine net or mesh, which gives it some transparency.
Chiffon is most commonly used in evening wear, especially as an overlay, for giving an elegant and floating appearance to the gown. It is also a popular fabric used in blouses, ribbons, scarves and lingerie. Like other crêpe fabrics, chiffon can be difficult to work with because of its light and slippery texture. Due to this delicate nature, chiffon must be hａnd washed very gently.
Since chiffon is a light-weight fabric that frays easily, bound or French seams must be used to stop the fabric from fraying. Chiffon is smoother and more lustrous than the similar fabric Georgette.

MM:Momme
Momme is a measurement used to determine the quality and weight of silk. It refers to the weight of a piece of fabric in pounds.The higher the momme weight, the more durable and luxurious the silk is.

Most commonly, silk with a momme weight between 16 and 19 is used for clothing and bedding, while silk with a momme weight of 22 or higher is considered high-quality luxury silk. However, the appropriate momme weight depends on the intended use of the silk product. For example, heavier momme weights are used for upholstery, while lighter momme weights are used for sheer fabrics.