Can't get socks which are pure cotton save 2% lycra anymore. I have pairs from M&S that I've had for years and eventually worn the heels threadbare - but such a comfy important staple.
Carelessly I reordered on the internet as they looked the same (black with coloured heels/toes for that Sunday afternoon pairing challenge that we all need
). They now have a massive amount of polyester in them! So they're sweaty and baggy and my feet feel cold and damp all the time. I've resorted to Falke at £10 a pair (they do label my left and right though
)
Bought some ankle high socks at the same time - those shorty trainer liner ones. They have a moderately higher cotton % but the elastic at the top is almost non-existant so they slither into your shoe/trainer and end up scrunched underfoot. 
How have they even managed to get socks wrong?!!
On a better note I got the last pair of size 6 tan suede autograph knee boots for £99. So great are they that I went back for the black leather ones. Classic styling and will last years. (They are the exception to the rule though). SEE THEM HERE IN THIS DAILY MIRROR ARTICLE