with the air flow sixth senthes they have a no strech core this improves bite sensitivity especialy on buzzer fishing where takes can be realy gentle on a slow reterive. Air flow had a bad reputation years ago but i have had dealings with these new lines and they are good especialy the Di`s you would in my opinion be best with your WF on resivoirs you can be exposed to wind and other elements take all the help you can get your DT is for chalk streamS. atb