Surgical mask usage: protect the wearer from sprays, splashes, and large-particle droplets. prevent the spread of potentially infectious respiratory secretions from the wearer to others. Surgical masks can vary in design, but the mask itself is often flat and rectangular in shape with pleats or folds. The top of the mask contains a metal strip that can be formed to your nose. ≥ 98% Bacterial & Particulate Filtration Efficiency (BFE/PFE). Elastic Earloop bands help hold a surgical mask in place while you’re wearing it. These can also be looped behind your ears or tied behind your head. The mask is FDA Listed and CE Certified