The ETUDE HOUSE 0.2 Therapy Air Mask is a mask specially made to feel light and comfortable like the air! The serum formula is encapsulated in a very thin 0.2 mm, hypo-allergenic sheet mask that aheres to your skin closely to let the essence soak into the skin while allowing ample air penetration to allow the skin to breathe and feel airy like there's nothing but air on your face.