Funny story about that, that costume is called the SkelaBoner.
Some years ago I was at a Halloween store buying a costume and I witnessed a mother helping her teenage son purchase a skeleton costume for a party. They selected that particular costume, it was obvious that neither one of them noticed what they were buying.
I couldn’t help myself, and pulled the mother aside and asked her to take another look at the costume. I wish I could’ve had her reaction on camera, she was so cool about it, thanked me, grabbed her son and went back to the skeleton costumes.