Face Mask :
A surgical mask, also known as a procedure mask, medical mask or simply as a face mask, is intended to be worn by health professionals during surgery and during nursing to catch the bacteria shed in liquid droplets and aerosols from the wearer's mouth and nose. They are not designed to protect the wearer from inhaling airborne bacteria or virus particles and are less effective than respirators, such as N95 or FFP masks, which provide better protection due to their material, shape and tight seal.
The design of the surgical masks depends on the mode:
usually the masks are three-ply (three layers). This three-ply material is made up from a melt-blown material placed between non-woven fabric. The melt-blown material acts as the filter that stops microbes from entering or exiting the mask. Most surgical masks feature pleats or folds. Three pleats are used to allow the user to expand the mask such that it covers the area from the nose to the chin. There are three different ways to secure the masks. The most popular is the ear loop, where a string-like material is attached to the mask and placed behind the ears. The other is the tie-on, which consists of four non-woven straps that are tied behind the head. The third is the headband, an elastic strap which is secured behind the head.