A hair gloss is a semi-permanent hair color treatment that adds shine and vibrancy to dull or lackluster hair. Unlike traditional hair dyes, a hair gloss does not contain ammonia or peroxide and is not intended to change the hair's natural color. Instead, it coats the hair shaft with a sheer layer of color that enhances the hair's natural tones and reflects light, creating a glossy finish.
Hair glosses became popular in the early 2000s as a low-maintenance alternative to traditional hair color. They are particularly well-suited for people with fine or damaged hair, as they do not damage the hair and can actually help to improve its condition. Hair glosses are also a good option for people who want to experiment with a new hair color without making a long-term commitment.