Vortex Men's Tick Repellent Hunting Mid Calf Socks - Hunters can now wear socks that hate ticks as much as they do, with No Fly Zone, a permethrin-based technology that repels ticks - infused right into the yarn. A mid-calf length fits perfectly into your boots for all-day hunting comfort. 34% Nylon/28% Merino Wool/28% Acrylic/8% Polyester/2% Spandex M: 6 - 8.5 L: 9 - 11.5 XL: 12 - 14.5 Mid Calf One Pair Ribbed Socks Style: 121-44