Power & Comfort Highly elastic nylon fibers impart power and reduce vibration for comfort. 4 (Four) sets of Sensation Comfort. Wilson suggests you tune up (restring) your racket every 40 to 50 hours of play.
I have my racket strung with this string at 50 main/47 cross which gives me the power and comfort that I am looking for.
It broke in less than a month.