I found this fabulous brooch at an antique store, and I just HAD to use it. There's SO MUCH going on. I've used it as an "eye patch" (you can see through it quite well) on a simple mask because it did not need any additional ornamentation. My partner wears a mask with a patch like this, and he maintains that you don't notice it after a few minutes; because the filigree is so fine, and also so close to the face, you see right through it, just as you stop noticing the frame of your glasses after a while. That said; this is not a mask for driving at night. Think of it as really light-duty sunglasses.
The wonder of a copper mask is in the strength and give of the material. Because it is so strong, the mask can be very thin- this makes it both very light, and makes it possible to fit as a second skin. These won't block your peripheral vision the way a leather. paper maiche, or plastic mask would. They can be very comfortably worn all day and night- no worries about sweat or rain causing them to soften and lose their shape. Rinse it with clean water at the end of the night before putting it away. They can stand up to anything you throw at them. As for packing? Throw it in your bag. If you're checking the bag, maybe stuff a balled up pair of socks where your forehead would go. Easy.
Not planning to wear your mask? He or she won't mind. They can hang flat against a wall, or sit on a shelf.