Check out the Unitronic PUR series from LappCables. You want the Unitronic PUR S17, 2 pairs
http://www.lappusa.comPROS: Outstanding quality, highly flexible down to -30 (tested), easy to knit og hang up, does not slide from poles, 4-5 mm thin. 3x cable on one roll.
CONS: A bit more expensive per m, thin wire for fixing of banana-plugs at the end.