Just a bodystock. A shirt. The one that adds sexy vibe to your body. Transparent, pleasant to watch, arousing and lovely.
It’s like a tanga from behind, as you can see on the picture. Also, your partner won’t be able to slide his dick in between the strings unless you move them to the side or little or tear them a little bit.
It is size free, meaning that it fits the skinny S, M and L sizes.