Medical surgical masks are medical masks commonly used in operating rooms and other environments where there is a risk of splashing body fluids and blood, which can block blood and body fluids from passing through the mask and contaminating the wearer. The mask has a filtration efficiency of 70% or more for bacteria, but the filtration efficiency for particles is limited, and it is mostly rectangular in design, and the fit with the face is not as tight as that of medical protective masks. Common medical masks have more names, and this level of mask does not require a barrier effect on blood, and there is no requirement for tightness, so it is only used for general medical environment wear. Common ordinary medical masks are mostly ear-hanging, and the appearance is more similar to ear-hanging surgical masks.