This two-layer cloth mask is made with "Wickron® Cool," a material known for its breathability and quick-drying properties. Its excellent ventilation prevents heat build-up, and it dries quickly after washing, allowing for repeated use. The resin nose clip and three-dimensional structure provide a comfortable fit. Non-woven fabric or gauze can be inserted into the pocket on the inside of the mask. *This product does not have a filter function on its own. *This is not a surgical mask and does not prevent pollen or viruses. Please refrain from purchasing if you are overly concerned about these points.