I purchased a set on March 15, 2017. I've worn these and washed them each at least 50 times, no exaggeration. I love these socks. They've done perfectly under wear and washing. FYI, I stand at my desk at least 5 hours a day with a lot of fidgeting, and I climb 4 flights of starts up and down while at work. No issues.Update: 1/14 - I should note after I wrote this that I looked at one pair, the dark blue with yellow striped ones, and some of the blue has seemed to seep into the yellow, or maybe it was blue from my dark jeans. Other than that, these are still perfect.They have a color set that's new to me that I like so I'm going to get those and add them to my sockfolio of fun socks.