'Blender arms are seetrough in unity

So I'm trying to animate fps hands but the leather gloves models that I use are see through on one side. I've tried every tutorial but at this model I can't select the side to make it good in unity too. The tutorial video that I tried: https://www.youtube.com/watch?v=9iV9wnvpQ1U. The model that I use: https://gamebanana.com/models/4315.



Solution 1:[1]

In blender, select the arms/arm > edit mode > face select mode > select all the faces on the object > mesh > normals > i think its render outside or face outside

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Solution 1 Hoax