Blender is a free 3-D software that lets you create whatever model you want. Its difficulty is based on how well you know the hot keys. I like to use this program a lot with Garry's Mod to see how well I can make body armor or some kind of car part. I spend most of my time learning more about blender and what I can do with it.
I know Bjork just wore one of these (not sure how she saw what she was doing) but with all the hysterical face covering masks I have seen recently, I think gay male designers have finally pulled the ultimate Fast-One over on women! hahah!!!