Our face masks are designed for both safety and comfort. The curved front allows for more freedom of movement without adjustment. The pleats are on the sides so that the mask fits better around the face and to the ears, giving solid contact all the way around. A wire is sewn in at the nose to give a proper close fit. Elastic loops for the ears are ¼” elastic and are 4.5” in length. There are openings on each side to insert a replaceable filtration layer.