45NRTH Speck Heavyweight Knee High Wool Sock - Grey/Dark Blue Medium. This knee-high sock is made with a Merino wool blend to wick moisture away from your feet keeping them warm and dry. They’re designed to work well with boots without adding bulk but they’re warm enough to keep the chill at bay.

Merino wool-blend fabric

11" cuff height

Ideal for the coldest days especially when wearing boots with pants and bibs