SW001594 Smartwool Men's Performance Ski Zero Cushion POW Print OTC This over-the-calf Merino wool sock is born from decades of experience. It offers a wealth of comfort- and durability-inducing features, all wrapped in the signature pattern of Smartwool's advocacy partner, Protect Our Winters. Wearing this sock will clearly state your commitment to the fight against climate change, helping to ensure our outdoor areas will be available for years to come.