fit, do not wobble, and have (not) air. The socks are very comfortable. They say also "socks" and no socks, so they are thinner! I can not understand some negative comments, such as "too thin" or "thinner than expected." People, then you buy winter socks or stockings winter or whatever.
For the summer (for me but also for the winter, because I have good shoes and thick socks no need) are OK. I know from experience that one should not make better use of those socks for skiing and hiking. But they are not intended. There are ....... normal socks up.