The only socks I wear for the past 3 years. All year.
We took the thermal properties of the original blue flame and blended it with the super moisture wicking and evaporative properties of bamboo viscose to keep your feet drier. A dry foot is easier to keep insulated but evne so this sock is constructed with thick loops of cushioning that help trap heat in. This sock rates 4 flames out of 4 for thermal properties.
40% Bamboo Viscose / 40% Acrylic / 15% Polyester / 5% Spandex
EcoSox Bamboo E-Tech Thermal Socks - High Performance Bamboo Viscose