This a great mask, the material wicks away moisture so it’s very convenient in cold weather. The package included metal strips to form the shape around the nose but there was no slot to insert these strips - my only complaint. That being said, the fit is excellent and this is the best mask so far for no fog in the glasses. The adjustable straps don’t slip. The fit is quite large so small adult fits perfectly. I bought sizes for the whole family and had to go back for more because these are the only style that the kids will wear to school.