To use the bra-mask, the wearer unsnaps the brassiere from under her shirt, which breaks it in two. Because each cup has hooks on its side, the strap is wrapped around the head and hooked to the cup, which goes over the mouth. Bodnar said an experienced user can don the mask in mere seconds.
Since the bra will break into two, you can save the life of the one closest to you in times of emergency because you will have an extra mask!
This may sound funny but hey you gotta do what you need to do in case of emergency.... so I guess better be prepared...
Here's a pic of Dr. Bodnar during the acceptance speech for winning the Ig Nobel Prize for the invention of bra mask...



