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 our 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. Made in the USA of Imported Yarn: 53% Merino Wool 42% Nylon 4% Elastane 1% Polyester. 4 Degree™ Elite Fit System: For a dialed, performance-oriented fit with flex zone at ankle joint. Indestructawool™: Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort. Shred Shield™: Shred Shield helps reduce wear from toes. Sock Height: Over-the-Calf. Protect Our Winters Signature Pattern. Indestructawool™ technology for enhanced durability. 4 Degree™ elite fit system for a dialed-in, performance-oriented fit. Shred Shield™ technology reduces wear from toes. Wider welt for secure fit and comfort. Body-mapped mesh zones for added breathability. 14" overall height. Made in the USA.