 | Samco Extra Heavyweight Socks | Orange/Navy | M. RefrigiWear Mid-calf, extra heavyweight, 49% acrylic/36% merino wool/14% nylon/1% spandex. Excellent durability and wick dry sock. 49% Acrylic/36% merino wool/14% nylon/1% spandexMoisture-wicking Samco Extra Heavyweight Socks | Orange/Navy | M... - Samco Extra Heavyweight Socks | Orange/Navy | M. |