Recommend that you renew insoles once every 1 to 2 years. Also recommend remolding once every six months. The bones in the feet consist of a total of 56 bones, making them prone to changes. After about a year, the shape of the foot may also change. And not only your feet, but also your legs, pelvis, joints, and muscles will change over the course of a year. Therefore, we recommend that the insole be remolded every six months and replaced every 1 to 2 years to accommodate your changing body.