Many women love braids and cornrows as they seem not to ever go out of style. This protective hairstyle, apart from its longevity, can save you from the about $30 to over $150 you could spend each month on a perm. Three months is believed to be the longest time your hair should be in braids. If you take care of your braids by keeping up with the moisture and cleaning the scalp, you will be good to go. You can even redo the braids around the edges for a fresh look.