They look like a fine idea for their purpose, but they would require a huge amount of adaption for their purpose imo.

In boxing it is not only the face that requires protection, but also the temples, rear of the head, lower neck and ears. (As you're already aware I know)

However, what I'm saying is, is to integrate this idea into the boxing headguard, would alter it's design so much that it would be a completely different headguard...