According to a Star Wars fandom here, Darth Vader's helmet
This [helmet] had a raised ridge that ran from between his eyes to the back of his head, where it merged into the durasteel, obsidian, and plasteel of the helmet itself. In addition, it was also rumored that the helmet's already strong metallic hull had also been further strengthened via dark side alchemy, with the specific technique not being found in the database of the Rhinnal Medical Academy.
Although unsure about the source, from the quote above, Vader's helmet is supposedly made of Durasteel, Obsidian and Plasteel.
So, is Kylo Ren's helmet and/or armor made of the same material as that of Darth Vader's? If not, what is it made of?