My youngest son who is very picky and has tactile issues with clothing will only wear these socks.  He started wearing them when my older son grew out of the medium size and passed them on.  That tells you one thing right there, these socks are durable as heck.  We still have a six pack set from two years ago that were worn constantly, with no holes and no thinning at the heels or toe.  I also love the sizing.  Three gold rings around the toe tells me which pair belongs to my older son and two gold rings around the toe tells me which pair belongs to my younger son.  They keep their shape and color well and my picky younger son says they are very comfortable.  Whenever I need to go sock shopping I don't even bother looking for any other brand.