Because you need your energy for more vital things than sweating or freezing. The relentless search for efficiency in weight and performance ability ends with rodent. He's perfectly adapted to the moist, cold enviroment, having been outfitted by nature for millions of years. The beaver. His coat is the inspiration for the unique material Macrotermes™. Half as thick as traditional fleece it still manages to improve on insulation. In combination with the 3D-BionicSphere® System it creates a product of the highest performance: the Beaver Performed Shirt™. It took a long time for the development department to be satisfied with it. The sport-specific fine-tuning began: computations, honing of details and function. In the end we have a perfect product especially for all types of cycling.