Under Armour Tri-Zonal Socks: These socks have three distinct regions: Cushion zones in the heel and toe for extra padding and shock absorption; stretch zones in the calf and across the instep to ensure a comfortable and tight fit on any size leg/foot; and vent zones in the lower foot and heel region that are ideal for wicking away any moisture to keep your foot dry and warm.
ArmourBlock(tm): ArmourBlock technology neutralizes microbes that cause odor before there's any odor at all.
UnderArmour ColdGear: Recommended for use when temperatures dip below 55 degrees (F), ColdGear features a double-sided fabric that wicks moisture from the skin and circulates body heat. Stay warm and stay dry, and stay out there!
Seamless Toe : No seams means no irritation, nice and smooth and soft for your toesies.
High Circulation Design: The arch design of this sock, along with the snug fit will keep good circulation throughout your feet, which is crucial to staying warm.