The flat top hat worn by Chassidish people (regular days)
This hat is called a "samet", and comes in "flach" (flat) or "hoicher" (higher) versions. There's also the open-crown Homburg style hat that's common in Chassidish circles.
The bent hat worn by Lubavitcher Chassidim
This is simply known as a fedora as in English or a "bent-down hat". The pinches ...
Many things we take seriously today had very humble beginnings.
From a purely practical perspective, black clothing requires less maintenance. In times before quick, cheap, efficient cleaning1 laundry was a major undertaking, and some outerwear (like hats) didn't like soap and water. Walking around a European city that could politely be described as "filthy"...
See Rabbi Wein's blog
The tradition of Jews is to dress modestly. Over the ages and in
different communities, this has had varied expressions in the type
of clothing worn but in all instances the common denominator of
Jewish clothing was that it enhanced modesty of appearance.
Even though Jews in the early Middle Ages wore maroon and brown
Jewish men have worn a plethora of hat wear, but the popularity of the fedora seems to have stemmed from the last Chabad Lubavitch Rebbe, R. Menachem Schneerson. R. Schneerson's adoption of this hat, which would influence the hat wearing of fellow Chabad members, is historically marked to his ascent in becoming the seventh Lubavitcher Rebbe, after the death ...