Zachary B 5 I have been using these masks for the last few months and anytime I put a mask that is not a NafiaS on, it makes me really appreciate how great these masks are.¥100 a mask might seem like a steep price but for the quality, breathability, and protection these provide I think it is a steal.The masks are rounded on the sides for a perfect fit to the face. Glasses do not fog up when using these masks. The band around the ears are soft and these masks can be worn comfortably all day long.