This listing is the 1-US-gallon (3.785 L) professional back-bar size of Paul Mitchell's Tea Tree Special Hair and Body Moisturizer, which explains the price point relative to the brand's small retail bottles — it's a bulk container meant for a salon, spa, or barbershop to dispense across many clients rather than a single personal-use bottle. The product itself is a multi-use leave-in conditioner and skin moisturizer built around what Paul Mitchell calls its Tingle Complex: 100% Australian-sourced tea tree oil combined with peppermint and lavender, formulated to produce a light cooling sensation on the scalp and skin as it's applied.
On hair, it's used as a leave-in conditioner on damp strands to smooth and add shine without rinsing. On skin, the same formula works as a body lotion or as an after-shave treatment, which is part of why salons and barbershops stock it in bulk rather than buying several single-purpose products. It's positioned for all hair and skin types, and Paul Mitchell states the formula is vegan and paraben-free.
Because it's a gallon jug rather than a pump bottle, it's built for professional dispensing equipment or decanting into smaller service bottles, not for a single household to use as-is.