Why is merino wool underwear not recommended as much as merino wool socks?
A fair majority of the hiking community prefers merino wool blend socks over 100% synthetic.
However, for underwear, typically merino wool blends are not recommended, while synthetic materials are.
If merino wool is great for socks, what makes it not great for underwear? And vice-versa, if synthetic is great for underwear, what makes it not great for socks?
*Bonus question: when, if ever, do you prefer cotton blends?*