The Brubeck Extreme Thermo Top is a seamless base layer top designed to keep you warm all winter long. Made with seamless technology in a two-layered, breathable, knitted fabric that uses far infrared rays (FIR) for enhanced thermo-insulation. The Extreme Thermo range features Double Heating micro fleece technology to keep you warmer for longer. This innovative technology consists of the selective, mechanical modification of the fabric surface to create a soft, delicate weave. Double Heating technology doubles the thermal insulation properties & the comfort of the fabric. The net structure and ventilation ducts provide enhanced moisture wicking in areas that collect sweat, while odor-reducing properties enhanced by coffee charcoal absorb and neutralize odors. Each piece in the Brubeck Extreme Thermo range is 3D body mapped and features four-way stretch for ultimate comfort and flexibility. Complete with anti-allergic and bacteriostatic properties.