One French woman began a religious order for the poor. In the rules of the order she stated that's the nuns must wear the same type of clothing as the local women. This they did (the fashion at the time was those high brimmed veils and simple dress.) The  foundress duly died. The next superior mandated that dresswear and after a few years, the nuns stood out in the crowd (especially in twos at airports!) The whole idea was lost. 

Jesus also gave his followers very specific instructions about dress. Completely ignored.