The masks fit well and are comfortable for long hours of use. Only a few minor complaints. Due to the shape and stiffness of the material they aren't as comfortable as some masks to pull down under chin temporarily when needed. Also, due to being packaged folded in half the fold in the metal that goes over the bridge of the nose requires some adjustment to get a seal in that area, however, with some minor finagling I didn't have as much of an issue as I do with other masks I've worn with fogging my glasses. Only minor complaints, but I do not yet have a lot of experience with other non-fabric masks. If available I wouldn't hesitate to purchase again for the protection and comfort they provide. Also, Kollecte's service seemed good and the shipping was prompt, would buy from them again.