Yonex 65z3 is a Yonex insole product. From what I understand, Yonex insoles are usually designed after sneakers and are designed to provide adequate support and comfort. However, the firmness of the insole is related to individual feel and needs, as everyone's foot structure and preferences are different.

According to the information I have obtained, the Yonex 65z3 insole has a medium hardness and provides moderate support and cushioning. If you prefer a slightly firmer insole, this might work for you. But if you prefer a softer and more comfortable insole, then it might not be the best choice.

However, I would also like to remind you that comfort is a very personal thing. It is recommended that you try wearing insoles to feel the support and comfort they provide to your feet. If possible, it’s best to go to a physical store to try them on and ask a salesperson so you can get a better idea of ??whether the insole’s firmness meets your expectations.