When ultimate warmth and comfort are what you need, pull on the PhD® Heavy OTC. We’ve updated this classic style with Indestructawool™ technology for ultimate durability and the 4 Degree™ elite fit system to keep the sock in place.
Heavy impact absorption and warmth for extended excursions
4 Degree™ Elite Fit System
For a dialed, performance-oriented fit with flex zone at ankle joint
Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort
Mesh ventilation zones provide optimum moisture management and maximum breathability
Built for Performance in the Highest Degree
Indestructawool™ technology for enhanced durability
4 Degree™ elite fit system for a dialed, performance-oriented fit
Body-mapped mesh zones for added breathability
Virtually Seamless™ toe for enhanced comfort
74% Merino Wool 24% Nylon 2% Elastane
Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.