I'm changing my initial review. After their first wash, I noticed a bit of deterioration from the initial look of the socks and expected this would continue, so I only gave two stars. But, after washing them 5-10 more times, they haven't had any more clumping/fuzziness and look to be holding up pretty well. And they are really, really comfortable. If you want your socks to look pristine, then look elsewhere (wool). But if you're fine with socks looking like, well, socks, then these are quite good, especially for warmer temps.