In the hotel where I am staying, there is a engraving with a guide to the various religious habits. Since it was made, many have disappeared and many new ones have been invented. I don't know either the above congregation or the one below but I am sure someone will.
Lourdes is always like a "New Pentecost" with people from every nation, race and language. These two ladies have applied a custom of their own which will ensure that they do not have aching arms from carrying large containers of Lourdes water.
Last year in Rome, I posted a couple of photos showing how the shop windows of liturgical suppliers can show changes in popularity of vestments. So I had to take this photo of the Notre Dame du Perpetuel Secours shop in the Avenue Mgr Schoepfer:
Here is a close-up of the chasuble: