ntroducing Solinco Confidential! Several years in the making, this co-poly has met the rigorous standards of elite ATP and WTA professionals. With its ultra precise response and 4-sided profile, this string has exceptional control and impressive spin-potential. According to our TW playtesters, Confidential not only rewards full swings with surgical targeting, it also has above average comfort for a poly-based monofilament. All in all, this is a very impressive addition to Solinco's polyester lineup.