It1 would be a good thing if on Shabbos and Yom-Tov chassidim would wear silk frockcoats.2 All the more power to those who will do this.

This subject is mentioned in a maamar of the Rebbe Rashab.3

In fact, in all things chassidim should conduct themselves distinctively,4 and one expression of this is wearing silk on Shabbos and Yom-Tov.

I am surprised that certain chassidim don’t. It was apparently ruled out by the prevalent poverty in Russia. At any rate, the time has come for chassidim to renew the custom until it becomes universal.5