The perfect Merino wool outdoor sock for running and hiking in cold conditions. Featuring targeted cushioning in key areas, the THERMO OUTDOOR SOCK delivers comfort and protection where you need it most. Merino wool ensures natural temperature regulation, helping keep the foot warm and insulated in cold conditions. A snug fit ensures the sock stays securely in place when covering uneven terrain, while vented panels in the midfoot deliver high levels of breathability. Constructed from a blend of natural and recycled yarns, the sock boasts over 47% recycled content and 24% natural Merino Wool.