I've been wearing this brand of socks for several years, and I love them. They are the perfect thickness for me, supplying enough padding without extra bulkiness. I have very sensitive feet, so socks are really important to me.
These socks retain their shape and never sag or bag. I have one pair that is about 5 years old and I wear them all the time. They don't slip down and they don't constrict or cut off your blood supply. I love these socks. And I love that they are a great USA product.