The reusuable mask is NOT an N-95 certified mask.The (white) mask consist of 1 layer of woven polyester fabric, specially treated to be be hydrophobic (resist water) with low air permeability. This model has 2 elastics that go around the head and neck. This model has a seam in the center where the 2 halve of the mask are joined. The mask can be washed and machined dried without detrimental effects. Breathing is comfortable and it seems to keep dust out very well.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.

1. Large Top Measurement 24-26"    Chin Measurement 20-23"
2. Medium Top Measurement 22-23"    Chin Measurement 18-19"
3. Small Top Measurement 20-22"    Chin Measurement  16-18"
4. Xtra Small Top Measurement 18-19"     Chin Measurement  14-16"