We have free shipping at both ways and greatest sales for the Thorlos Hiking Wool/Thorlon Crew 6-Pair Pack Grey/Black Hosiery Designed for extended hikes in moderate to cold climates on varied or rugged terrain. Midweight padding in the heel and ball protect the foot from shear and impact forces and helps prevent painful blistering. Lace pad protects the top of foot against boot lace pressure. Ventilation panel enhances wicking. Fiber Contents 53% THOR LON Acrylic, 33% wool, 11% stretch nylon, 3% spandex. Thorlos Protection Level 3 Maximum Provides the Maximum Protection for the most rugged and challenging activities and weather conditions). Sold as a 6-pack.