With regard to hair covering, hirhur is, at best, a secondary consideration. If hirur from uncovered female hair were the main issue, then all women, 12 years and up, would be required to cover their hair as do Moslems for exactly that reason. The issue with a married woman going with uncovered hair is pritzus. Such a woman is falsely indicating that she is mutar l’shuk when, in fact, she is an eishes ish. Over the years other simanimm, wedding rings etc., have developed to indicate a woman’s marital status and uncovered hair is no longer positive siman of unmarried status. Nevertheless, it is a minhag kadosh for observant Jewish women to cover their hair but it, apparently, no longer matters what it’s covered with. Covering her hair with someone else’s hair seems to be sufficient.
