Thermal Deep Cleansing to Draw out Impurities. Hypo-allergenic This gentle thermal mask is ideal for blemish prone skin. It contains Zeolite Clay, which heats up on contact with water to open pores and draw out impurities. Further enriched with pumice particles to sweep away dirt and everyday impurities. Rosehip oil leaves skin feeling soft and moisturized, even after the deep cleaning experience of the mask. As you rinse, it tightens pores to leave your skin feeling refreshed, healthy and incredibly clean.