Just out of curiosity how do the corshorts work as opposed to a normal compression short? Are they mainly a really good compression short?***I modified my question to better ask what I wanted to know and I also added the piece belowRule 4.1.2 (taken from the USAW technical rules) b) Close fitting leotard / cycling trunks may be worn under or over the costume. They must not cover the knees.This to me makes it seem that wearing the corshort in competition to be legal even if they knew about it.