The reusuable mask is NOT an N-95 certified mask.The (white) mask consist of 1 layer of ALLERGY Barrier fabric, with low air permeability. This allergy barrier fabric is designed to filter out particles larger than 9 microns. This model has an elastic that goes around the ear. This model has a seam in the center where the 2 halve of the mask are joined. Breathing is comfortable and it seems to keep dust out very well. It can be washed over and over and retain its filtering qualities. We Have 4 sizes Large (fits most men), Medium (fist most women), Small (Small faces and teenagers), Very Small . If you use them on children Please Proceed with extreme caution! Try it out and observe them for a few minutes, make certain they can breathe properly!
If you want to get a better idea as to which size to order,(after all what good is the mask if it does not fit well and it sits around your neck) use a string and measure your face according to the pictures. The mask has 2 elastics. The top elastic goes from the bridge of the nose around the top of the ear and the wider part of the head and back to the nose. The bottom measure starts at the chip goes below the ear around the lower neck and back the chin.Use these number in inches to get a rough idea of which size to order. These numbers are "rough". Frankly we only have about 50 head measurements so there is not enough data to assure a perfect fit. Let us Know and we will work with you getting the fit right.