Lasts a long while. Personally, I was never close to pain wearing them, and I wear them 4-8 hours daily. With the Yakima system, there are replacement parts available if needed but with this Inno system, it appears a whole new system would have to be ordered if something breaks or wears out. Me acaba -molestando- (que no doliendo) al cabo de unas horas. remember no headphone included! Neither can I. I could walk all day in these shoes. I use these seed beads to replace french knots when I am cross stitching. 0, fiable, stable et flux HD impeccable ! *Prices shown are the actual cost at Amazon including coupon discounts but excluding tax; all got free Prime shipping.