I did a test on my first few shirts a few days ago. I was throwing them into any laundry that the wife was doing. I had them in with jeans, socks, , and just about anything. After 20 something washes they still looked just fine. I have a few that I sold that people are wearing running almost every other day for the past week and wash them every time in the florida heat and they have not complained about them at all when i did a follow up with them after the half marathon they did.