It's a cold weather helmet. That piece over the forehead is to protect the sensitive "inner eye", sometimes called the "third eye", or "psychic eye". It was the standard cold weather gear of my tribe and a part of a total outfit called a "Snow Suit".
For small babies, these outfits would be knit out of course wool by the old women. As the children grew older, the mothers would make them out of old wool blankets and sew them on treadle machines called "Singers". They were called that because the women chanted and sang traditional songs in the native language while they worked.
I remember some words from those old songs, but I have forgotten the language. Here are some of the words I remember: "Maizedoatsndosey doatsn littledoseydivey". I recognize "maize" so I know it's something to do with corn.
I hope to be able to recall the codes before I die so I can pass the knowledge contained in these sacred chants of my elders on to the younger generation.