Technifibre's X-Code H.D. is an interesting and unusual string, in that it is a multifilament but made of polyester. As far as I know Technifibre is the only company offering such a string, a polyester multifilament. I have a pack of this string as 15L / 1.32 mm gauge, but so far have not tried it yet. It is also available in 16 / 1.28 mm gauge. Has anyone tried this string? If so, what did you think about it? Tecnifibre describes this string as having the following properties: Firm feel / Resistance / Spin / Shock Absorption Are they speaking the truth? I am curious if it feels different compared to a polyester monofilament.