Under Armour Men's UA Zagger Crew Socks Signature Moisture Transport System wicks away moisture and dries quickly, keeping your feet cooler and lighter ArmourBlock&#174; Anti-odor technology prevents the growth of odor-causing microbes, so your socks stay fresher, longer Cushioned footbed absorbs shock, providing you with lasting comfortEmbedded arch support aids in the increase of blood circulation and helps conform to the shape of the foot Strategic ventilation dumps hot air in zones where your foot does the most work Contoured "Y" heel provides a comfortable fit