While most of my Viccel socks have been excellent, the some of the newer ones (all knee height) have shown interesting signs of wear. The elastic on the upper part has deteriorated and the rubber threads are visibly broken. Older pairs haven't had any of these symptoms.
Sad thing is that it renders the socks unusable without garters, as the socks won't stay up for long.
Normal wash, line drying.
(An another thing is that the socks bleed colour rather heavily at first, i.e. 3-4 first washes have to be done by hand.)