The heavy duty OTC tactical sock, now in a 2-pack, is designed to withstand all conditions with cushioning surrounding the entire foot and leg. 37.5 active particles supercharge wool&';s natural abilities by attracting moisture while still in vapor form, before it becomes a sweat droplet. Stay drier longer and increase athletic output. Contents: Wool 70% | Nylon 25% | Elastic 5% Berry compliant options available. Please contact [email protected] for more information.