A professional-grade rubber mask from Lindsay, the Korean brand best known for modeling masks that deliver a genuinely different experience from a standard sheet mask. The powder mixes with water into a soft, jelly-like gel, sets into a firm rubber layer as it dries, and peels off in one piece. That rubber setting is not just for show. It creates a seal against the skin that traps active ingredients and prevents them from evaporating, so the essence works its way deeper than a sheet mask or a rinse-off mud mask typically allows. The Cool Tea Tree version is built for oily, congested, or irritated skin. Tea tree leaf powder brings a natural antibacterial and calming effect, working alongside centella asiatica and allantoin to soothe redness while diatomaceous earth and algin (from kelp) draw out impurities and excess sebum. The cooling sensation on application is immediate and genuinely refreshing, and once peeled away, skin feels matte, calm, and clearly refined rather than tight or stripped. A spa-level treatment you can do at home, and one of Korea's most consistently well-reviewed mask formats.