|Duofold Mens Varitherm Mid-Weight Ankle Length Thermal Bottom - Black KMC2 fiber content is 96% Polyester / 4% Spandex Jersey. Duofold Mens Varitherm Mid-Weight Ankle Length Thermal Bottom - Black Features: Single-layer thermal for warmth in cold weather. Flatlock seams to avoid irritation. Top: Drop tail for protection against the cold. Bottom: Drawcord for custom fit. Odor resistant, Moisture Control, 360 Degree Stretch. previously the . Duofold Mens KMC2 comes with 1 Thermal Bottoms per Pack.