Why a Woman Covers Her Hair
If a woman does not cover her head, she should have her hair cut off; and if it is a disgrace for a woman to have her hair cut or shaved off, she should cover her head.
Modesty calls louder to the women understanding the bible from a literal point-of-view. That's why you'll see women wearing headscarves, wigs, and hats, even in the hottest weather.
For centuries, cultures have been creating their own identity. It's a way of showing allegiance to a certain group. The woman who keeps her head covered goes beyond being one of the gang. She is showing allegiance to the word of God without adapting to modern standards.