Made in Canada, the O2 Curve Mask is a hard-shell mask with a filter inside. The only problem is that it is not a very visually appealing mask, according to Leo. The mask provides respiratory protection with a tight seal and breathable filters. Its filter material removes particulate matter and the edges are medical-grade silicone. The neck strap has a snap-button clip and the ear loops are soft silicone for comfort. The o2 Curve comes in High Bridge or Low Bridge options, and a white shell is included (with black, blue, and red shells available if desired) in the package. The O2 Curve Respirator is not guaranteed to protect users from the coronavirus.