This is something new in the zentai fashion. At least for me. I had a photo I could not find at the moment. It’s probably even published here somewhere.On the photo there is a person in a similar dress but without sleeves (hands are bound inside the sleeveless dress) hung upside down by the dress (legs inside). So it looks like he/she was trapped in a sack. (Will check again tomorrow, I must’ve missed it)

You may want to check this eBay shop ( or this one for more designs.