I've used many similar socks for my Professional Danskos and Dansko Sally shoes in the spring and summer months, and these are the best; I won't by any others now.  These are discreet, skin colored (if you're caucasian), and stay in place thanks to the slightly sticky pad on the inside against your Achilles tendon.  I've had them for almost 3 months and use them every week and wash them in the machine and put them in the dryer, and they are holding up well.