Winter "Hair Hats"

Most people associate winter accessories with scarves, gloves and hats. But I don't mean hats in the normal sense. For those looking towards protective styles, I'm referring to hair hats. You can keep your hair in two stand twists or flat twists underneath, allowing you to take the hat off and properly cleanse and moisturize your hair weekly. They don't have to look tacky where people can see the tracks or glue in your "invisible" part, or see the lace in your lace front. They can look realistic! See below for some hats I've made or bought.

You can even make your own. Materials?