It is a soft to the touch mask that uses 100% organic cotton non-woven fabric for the mouth and surface sheet. Cotton with excellent moisture absorption absorbs moisture from the inside of the mask and prevents uncomfortable stuffiness and condensation. Soft sheets of cotton relieve friction of the mask with skin that has become sensitive to winter dryness and pollen. Oxygen-based bleaching is used for bleaching cotton. Since the components of oxygen-based bleach are substances that originally exist in nature, they have an overwhelmingly low environmental impact and are safe for the human body compared to chlorine bleach. A high-quality filter that cuts 99% of virus-containing droplets, pollen, PM2.5, etc. is sandwiched inside the sheet. (PFE 99% / BFE 99% / VFE 99% MEASURED AT NELSON LABORATORY IN THE U.S.)