Timberland PRO Men's Skim Coat Thermal Bottom Main Fabric: 93% Polyester, 7% Spandex; Trim Fabric: 96% Polyester, 4% Spandex Imported Machine Wash Dual-zone insulation helps keep you warm in all the right places Superior wicking and odor resistance help you stay dry and focused Hi-tech, breathable fabrics provide maximum comfort and range of motion