Although I don't own any human hair wigs, I do own HD fiber wigs ( heat defiant) and this stuff is wonderful when steaming or using a flat iron on your wig. I would not flat iron any of mine without using it as the fibers will become very dry. I also use the HD conditioning spray along with this product and it keeps my wigs looking and feeling soft after heat. I don't buy any of my dark colors in HD but I do prefer my blondes in this fiber because they look more realistic , no shine and a little dryer fiber for realism. If you own any wigs that you can use heat on , regardless of brand, get this stuff!
works wonders on HD fiber