I was told the EQ fabric was best for below freezing temperatures (snow caves, etc) and that it didn't breathe as well as the non-EQ version, nor would moisture dry from within as quickly. It would help alot if it is being dripped on, and would help alot in an open shelter with alot of wind (like last week)...

Maybe the information I was given was wrong, but I decided to get the regular version since I'm mostly on the above freezing/no snow trips.