Hair in its unaltered, natural state, completely free from chemical processing, is a key indicator of its inherent quality. This encompasses hair that has not been permed, dyed, bleached, or subjected to harsh treatments that compromise its integrity. For example, strands taken directly from a donor and carefully wefted into extensions, without any alteration to its original condition, would meet this criteria.
The value of unprocessed tresses lies in their strength, longevity, and natural luster. The cuticle layer remains intact, providing a smooth surface that reflects light effectively and minimizes tangling. Historically, societies have prized natural, healthy hair, associating it with vitality and beauty; this preference continues to drive demand for high-quality, unaltered human hair in the modern extension and wig market.