It is new and improved Jes-Extender.A.

Introduce "Highest relief string" new designed again. We were able to improve it by designing the string that had already gone well like being useful further more for your necessity again based on your feedback. When you just thought that our string was not able to become more comfortable than it, the string was improved, and Jes-ExtenderA. was completed to continue it really through life.

These new strings are easier than it detaches it putting it more strongly, and are
more comfortable than ever.

As for us, it listened, and you obtained what asked for the following. Model who lasts long from our competition in all respects, superior, and overcomes it who has been completely completed.