The Darn Tough T4050 Tactical OTC Heavyweight With Full Cushion socks are crafted for those who brave extreme climates and rugged terrains. As the warmest and tallest option in the line, these hunting socks offer full terry loop cushioning for unparalleled warmth. Designed to provide a snug fit, they ensure no slipping or bunching, allowing you to focus on your mission. Reinforced heels and toes enhance durability, making them a reliable choice for challenging conditions. Designed for extreme cold weather and mountaineering Full terry loop cushioning for maximum warmth Elastic support at the arch for a secure fit Reinforced heel and toe for enhanced durability Tactical over-the-calf design covers the leg to just below the knee Performance fit prevents slipping, bunching, and blisters Berry Amendment compliant, made with Merino wool sourced in the USA Certified by USAF Safe to Fly and NAVAIR SOA Flame resistant and No Melt No Drip certified for safety under combat uniforms Made in Vermo