Face masks come in various types and styles, including 3-layer masks. A typical 3-layer mask consists of an outer layer, a middle filtration layer, and an inner layer. The outer layer is usually made of a non-absorbent material, such as polyester or polypropylene, which helps repel moisture and droplets. The middle layer serves as a filtration barrier and is often made of materials like melt-blown fabric, which can capture tiny particles. The inner layer, in contact with the wearer's face, is typically made of a soft and comfortable material like cotton.

These masks are intended to cover the nose and mouth snugly, creating a barrier that helps prevent the release or inhalation of respiratory droplets. They are commonly secured behind the ears with elastic ear loops or tied behind the head with straps, ensuring a secure fit.

It's important to note that while face masks can be effective in reducing the transmission of certain particles, they are not foolproof and should be used in conjunction with other preventive measures such as hand hygiene and maintaining physical distance. The specific design and effectiveness of face masks can vary, so it's essential to choose masks that meet recognized standards and guidelines in your region.