J.B. Extreme- Technical Explorer Merino & CoolMax Sock (1 pair) Content- 36% Merino, 36% CoolMax, 24% Nylon, 4% Spandex Merino & CoolMax - We blend the highest quality merino wool with Coolmax for amazing softness, warmth and moisture management. Impact Support Zones (strategically reinforced zones) for durability & shock absorption. Double cuff, arch & ankle support (strategically placed elastic) for superior fit Made in Canada! Anti-blister- Helps reduce friction causing blisters