Charmeuse is a lightweight fabric woven with a satin weave, in which the warp threads cross over four or more of the backing (weft) threads.

These float threads give the front of the fabric a smooth, reflective finish, whereas the back has a dull finish. It can be made of silk or a synthetic lookalike such as polyester.

Silk charmeuse is more expensive and delicate but is softer and a better insulator. Polyester charmeuse is cheaper and can often withstand machine washing, but it does not breathe as well as silk.

The luster and delicate hand make charmeuse suited to lingerie, flowing evening gowns, and draped blouses. It is best suited to a more fluid, slinky bias cut, and drapes well.

Its uses in menswear include the lining of jackets and slacks, handkerchiefs, ties, and underwear such as charmeuse boxer shorts.

The look of satin is prized for dressy garments, especially when cut on the bias, since it flows well on the body and catches light in stunning patterns.

More Info: en.wikipedia.org