| Duofold Mens Originals Mid Weight Thermal Union Suit - Red KMMU fiber content is Midweight 2-Layer Thermal fabrication featuring a 25% Merino Wool blend outer layer and a soft 100% Cotton inner layer for comfortable warmth in cold weather.. Duofold Mens Originals Mid Weight Thermal Union Suit - Red Duofold Originals created the base layer category with the first bi-ply thermals. Each style is constructed to offer unbelievably soft cotton against the skin, paired with the natural warmth of wool for superior thermal insulation. Duofold Originals . Duofold Mens KMMU comes with 1 Thermals per Pack. |