Update: I added one star - It seems that only one of the six pairs is misshapen (tight in the toes, loose at the heel), but all pairs are a bit long and they seem to twist easily.  I wore them for a run on the treadmill tonight, and it is about 100 degrees outside - my feet seem pretty dry, not extraordinarily hot considering the conditions, and no blisters. I will update in a few weeks as to durability, etc.

Original review:  The socks are thin - but that is not even the problem. Tight in the toes, looks like there should be arch support (there isnt), and long/wide in the heel. I wear a size 8 running shoe, so I should be middle of the road with the fit of these. Oh, and there is a seam that runs along the smaller toes in a very uncomfortable way.