“More practical than umbrella nad can be used on Shabbos.”
Does this “coat” come with the approval of poskim who assir the Brooklyn/Boro Park eruvim?
When it rains on Shabbos, you are nor permitted, according to many poskim, to wear a cheap thin plastic raincoat, since when it stops raining you will be embarrassed to wear it (you would never wear it any other time)and might take it off and carry it. A rain cover for a hat, while there is a a machlokes haposkim whether it’s mutter, is a different matter.
It seems to me from the posts above, that this may apply to this type of raincoat as well. I have worn it, and besides its look, it gets very hot and uncomfortable, and I can see where someone would remove it when the rain has stopped.