With its ultra-predictable response on full swings, Razor Soft received an excellent score for control. What separates it from many of its competitors is the fact that it achieves this control without feeling overly stiff or unresponsive on off-center impact or slower strokes. In fact, Chris found enough pop with this string to keep the ball deep and impose his will. He said, "I liked the response of Razor Soft. The string had enough control to let me swing aggressively and go for the corners of the court. I felt like there was enough power to help me push my opponents off the baseline and also to put my shots away. I think Razor Soft is very much a control string, even though it gave me easier access to depth compared to other Tecnifibre strings like Razor Code or Ice Code. Compared to those strings, it felt like I was getting more dwell time, which resulted in a higher launch angle and more depth rather than noticeably more pace."

Like Chris, Michelle was impressed by Razor Soft's control, but she also found just enough power to finish points. She explained, "I got to playtest this string while watching Medvedev win some tournaments and listening to him comment on how the playability of the string was helping him achieve success. So let's just say I was slightly influenced and hyped to be using the same stuff he's transitioned into for 2023. With that being said, I was a bit misled by the name and was worried that it might be too soft and lively for my game. Luckily for me, the string had great control, but it also gave me just enough power to put balls away. Throughout the playtest, I felt very connected to my shots and really enjoyed how easily I could place the ball."

With its round shape, Razor Soft doesn't have the grippy edges of a shaped poly like Tecnifibre's 4S, but it still proved quite spin-friendly. In fact, Chris was impressed by the range of trajectories and angles that Razor Soft enabled. He said, "I was very happy with the amount of spin I could generate with Razor Soft. My slice shots had some nice bite to them, and I felt dialed in on the amount of spin I was getting on the ball. On topspin shots, I felt in control when I hit angles and lobs, with a good sense of the loop I was going to get from the spin. The extra dwell time also gave me more depth and directional feel with my spin shots, which made it easier to predict the landing point of angles and lobs."

"I found good spin from this string, but I don't think it was necessarily the defining feature," said Michelle, who ultimately found enough spin to bring the ball down on schedule. "I am not a player who demands massive spin, but I can appreciate it when it is there. With Razor Soft, I was confident that I could swing aggressively and get the ball to drop inside the lines."

Polyester monofilaments are firm by design, which is why they sometimes feel uncomfortable and dead, especially on off-center impact. To address this issue, Tecnifibre injects a flexible polyurethane additive into the core of Razor Soft. The result, for Chris, is a great-feeling co-poly that provides exceptional command over the ball. He said, "My favorite part of hitting with Razor Soft was the feel at contact. I got the sense the stringbed was pocketing the ball nicely. My touch volleys were working well, and I was very happy with the feel I had for those shots. From the baseline, I found the feel to be controlled, with a sense that the ball was sitting long enough on the strings to allow me to dictate what I wanted to do with my shot."

For Michelle, this string felt great across several different tensions and racquets. She described, "Despite its name, I found a firm feel from Razor Soft, but it wasn’t uncomfortable. It wasn't super plush, but it pocketed the ball well. I liked the feel and was able to test it at several tensions in a few different racquets, and I loved what it had to offer when strung above and below 55 pounds in firm frames."

In addition to its outstanding control and feel, Razor Soft also has impressive playability duration for a poly. For Michelle, Razor Soft definitely went the distance. She said, "I had this string in at least three racquets of mine all strung at various times during the playtest. I found I could go from each frame and consistently enjoy what the string had to offer. After three weeks, it did drop off a bit and lost some of its control. That was interesting to note because I know Daniil isn't super specific about getting all of his frames restrung before matches, and now I can see why."

"Razor Soft lasted well for me in both open and dense string patterns," added Chris. "This is not a string I'm going to break, so I was able to get a solid three weeks of hitting on it before I felt ready for a restring. The two-week mark is my barometer for playability duration, and Razor Soft passed that with no issues. The surface of the string also held up well, and I was happy with the spin I was getting right up until I cut it out."