I broke my AirFlo Sixth Sense WF5/6 S3. I liked that line so I called Caddis Fly shop to buy another one. The guy suggested the (new) Rio "Fathom" line (designed for lakes). I googled some reviews and pulled the trigger. I got it today and tried it out on my local lake from a tube with a ten ft rod. I am one happy camper. It just felt "better". The head is black and the running line is brown. Virtually no tangles. And.. the way it sank seemed to be more "even". I was bummed when I broke my AirFlo line but now I'm kind of glad it happened.