Review title is Worst Hair Ever [SEP] Yes, it's human hair, but it's as brittle and rough as straw after the first wash - and washing with high quality salon Biolage, even. Very disappointed. Unmanageable. In addition, two came out within 3 days of installation. Have not used heat at all on them, but it made zero difference. Tangles constantly because of uneven lengths throughout. At first, I thought they assembled the hair with no attention to cuticle direction. Now, I think it's both that and the uneven lengths.