I don't remember when I purchased these, but I know it's been about 2 years now...I love these shoes. I'm actually wearing them right now. They are super cushiony and supportive, feels like I'm walking on air. I wear these for exercise, or if I am going to be doing a lot of walking. They are super super comfy and last a long time. I always buy asics for that reason. You don't have to buy a pair but every few years, unless you are a heavy user, in which case you may wear them out faster. For moderate to moderately high usage, you can make a pair last for a solid 3 years. My last pair was a blue and brown pair I had for 3 years.