“It is good to cover with two coverings. “
It is good does not mean the same thing as it is mandatory. I do not believe that question was answered as a p’sak halacha. The loshon is ambiguous. A lot of things might sound “good” but are not actually required. Is there a single poseik who says you may not allow a young man in to daven with a minyan if he has no hat on? If so, who is he and what are his precise words?