ExOfficio BugsAway Hiker Quarter Socks 25% Wool, 25% Reprieve Polyester, 46% Nylon, 4% Spandex Made in US Made and treated in USA Turn-welt top Spandex throughout Insect Shield technology repels mosquitoes, ticks, ants, flies, chiggers and midges Made and treated in the USA Ventilated toe panel Moisture wicking and odor resistant wool blend