Of course, spandex. Generally, after adding spandex, the feel of the fabric will be very comfortable, and it will be more close-fitting after wearing it.

In addition, after adding spandex, the stability of the fabric will be better and the shrinkage rate will not be too great. The most important thing is that ordinary silk fabrics are very thin, which is easy to get sloppy after wearing for a long time, that is, the seams are easy to crack, which will be greatly improved after adding spandex.