The ALTERA Alpaca Prevail Hunting sock is the choice for the sportsman and sportswoman in all of us. Same yarn and construction as the Explore, the Prevail is a medium weight sock that is taller at 9" Crew or 12" Over the Calf. If you're in the most extreme conditions, you want the Prevail on your feet. This is the choice sock for those that use taller boots for hiking, hunting or skiing. 
Proudly made in the USA.
 
ALTERA Alpaca Shoe Size Chart
Shoe Size              Women's             Men's
Small                      4-6                      3-5
Medium                  6-10.5                 5-9
Large                     10.5-13.5             9-12
X-Large                  13.5-15               12-14