ExOfficio BugsAway Purdom Vented Hiker Sock 34% NatureSpun (Recycled Polyester)/ 33% Wool/ 31% Nylon/ 2% Spandex Imported Reinforced heel and toe for durability Arch support and ventilation for your comfort Built-in insect repellent to keep those annoying bugs away Lightweight, moisture wicking, and extremely packable