This 100% Mulberry Silk Face Mask is gentle on the skin and comfortable to wear. Silk is known to possess antibacterial and antimicrobial properties inherently as it is naturally hypoallergenic. Unlike other face masks that can irritate your skin, the smooth, soft and natural silk material hugs your face for a secure seal and is comfortable to wear for long periods of time. In addition, the nonabsorbent, nature of silk helps to keep skin hydrated. The mask's disposable filters are made of melt blown. You've heard of melt blown because this is the material used in surgical / healthcare masks. Melt blown is a nonwoven fabric, which means creating it does not involve joining yarn by weaving or knitting (like cotton); instead, material is mechanically, thermally or chemically bound from separate fibers of molten polymers to form a web-like fabric. This creates a material that has smaller "pores" which means it can more effectively block airborne particles.