“fantastic product but not without a flaw”

“A wonderful buy, but as warned in other reviews there is the flaw of the heel slipping. I figured since I'm 10.5 max I'd be fairly ok. Not that I'm unhappy with the socks, but I was definitely wrong. Given circumstances I can't say much for durability as these are too nice to use with my most often worn shoes (work; beaters). Though I don't think they'll wear out in a flash either. Only time and opportunity to use with better shoes will tell. I had purchased a buy one/get one 2 pack of Ferrera/Carlsbad, and in turn purchased these specifically. But they don't quite equal out to them. They're somehow different...it's strange. So I then ended up buying 6 pairs of these. More confused than unhappy. Wonderfully soft and granted your feet can certainly feel cool from thinness...but I live in the desert. So no qualms over that. After all is said and done, Multiple pros definitely outweigh 1 con.”