This Thorlo sock is perfect for extended backpacking in cold weather over rugged and varied terrain. 

• Ventilation panel enhances wicking
• Heavyweight padding in the heel and ball protect the foot from shear and impact forces helping to prevent painful blistering
• Lace pad protects the top of the foot against boot lace pressure
• Spandex and low density padding in the arch create a snug fit
• Full padding around the toe area for ultimate protection
• Made from 44% acrylic, 39% wool, 8% stretch nylon, 6% insulating hollow-core polyester, 3% spandex