The Alpaca Performance sock is one of my favorties. I love the blend and the way the sock fits on my leg and foot. This blend allows a close fit on the leg, high enough for taller boots and protection against chaffing, and great arch ribbing and cushion in the ball of the foot, heal, outside foot edge, calf, and boot top.
This sock makes the list for one of THE BEST ALPACA SOCKS!
Small/Medium for sizes 7.5-9
Large/XL for sizes 10-13