As an adjective typically described as "superlative" or "miracle," "it's a 10 hair" is a colloquial term that serves as a glowing appraisal of one's hair quality. For instance, if a person receives a compliment after getting a haircut, they might respond by replying, "Thanks, it's a 10 hair!"
The term has gained traction due to the popularity of the American haircare brand "It's a 10 Haircare," known for its extensive line of shampoos, conditioners, volumizers, and styling aids. Since its establishment in 1995, this brand has made significant contributions to the haircare industry, introducing groundbreaking products that enhance hair's luster, strength, and manageability. The brand's success has played a role in popularizing the phrase "it's a 10 hair" as a descriptor of healthy, beautiful hair.