I feel like this thread is just a bunch of loops. I guess it's time to answer my own question and explain what "Hydraclear" is.

To find the answer, I went to good ol' Google, which then led me to Acuvue.com. That's where I saw this entertaining little video about the wonders of Hydraclear. It's a coating they add that increases comfort and oxygen permeability. Watch the video for yourself:

http://www.acuvue.com/technologies-home.htm#MOISTURE_AND_COMFORT