I've only had the shoes for 3 months and they are ready for retirement. Compared to other balancing shoes, the quality decreases. I use them every day for running and they show very worn soles (bottom and sides) and holes in the lining of the shoe (this is the first time this has happened on one of my shoes). I walk on good roads/sidewalks. I expect the shoes to last over 3 months with regular use. These are very comfortable shoes, but also very expensive disposable shoes. :-(