Socks
We have lots of socks... and no cotton.
Don't spend good money on great shoes and then use cheap cotton socks that may make your feet unhappy.
You would not put ketchup on filet mignon, don't wear cotton socks in your expensive running shoes. Your feet will be happier, shoes last longer and smell better, and good running socks go for years (don't use bleach or a HOT washer or dryer, do use liquid detergent for technical apparel.
We have -
Balega
Feetures
ASICS
Wright Double-Layer
Smartwool
Wigwam Ironman
Injinji toe socks
CEP compression