I have a co-worker who loves unicorns and I work the night shift with her so after a while we both go crazy the same way. I waited until the middle of the crazy 3-4am time and tried to scare her with a mask. It did not work. But we both had a lot of laughs, and I enjoyed a little laugh. Although it's pretty hard to see and breathe, it's still fun. I'm not sure if the mask is covered with any substance as I'm not allergic to latex, but I've found that I have to wash my face after wearing it or I get itching and breakouts.