3 layers of protection - Internal layer: Soft fabric absorbs water and sweat. Central filter layer: Designed to filter bacteria. External hydrophobic layer: provides a physical barrier to protect the user from drops and air pollution. Fits your face - with the design of the nasal bridge and ears, it adapts exactly to your face for durable and comfortable protection Filter the particles - These disposable medical masks are a physical barrier to protect the user from the drops of external substances, air pollution, dirt, smoke and dust.