I have used Asics shoes for a long time and have not been able to wear them out. Truth be told I would buy a new pair every year and half and have bought only asics for running shoes the past 10 years. I bought these on April 29th and would only wear them at the gym or on weekends. Around June 30th while on vacation the soles started to fall apart. There is still a ton of tread left but the black rubber that makes contact with the ground has fallen off both heels.