Fox River Men's Premium Boot Sock 85% Merino Wool 14% Nylon Made in US TOASTY WARMTH ON THE COLDEST DAYS: Highest level of cushioning for extended trips and frigid weather BENEFITS OF MERINO WOOL: Merino wool naturally thermoregulates, keeps you dry and reduces odors too, it's also luxuriously soft and comfortable. Unlike coarser grades of wool, Merino is much less prone to itching STAY OUT LONGER: Spandex compression arch adds support and won't sag; support at the arch helps fight fatigue and keep sock in place MADE TO LAST A LIFETIME: Heel and toe are reinforced with nylon to add durability and longer sock life BACKED BY COMPANY STANDARDS OF EXCELLENCE: Fox River products are guaranteed against manufacturing defects for one year; products may be returned within one year with the dated receipt to the store where you purchased them or by following our FoxSox.com return process