STS is well-known for giving 2/3 of the tension energy to spin and 1/3 to speed. X-Tend HS has the same charachteristics, but has now been re-designed to deliver even greater power. To comply with the ban on speed glue, Yasaka has developed a powerful new tension rubber.
STS still works as before, but the top sheet and sponge have been completely re-desingned by ground-breaking new technology. It delivers high-power speed with easy handling, just as players would wish. Please do not aplly speed glue, as it will destroy the rubber.
X-Tend HS is not only fast enough without speed glue, but also very sensitive because of the new technology.
Made in Germany.
