Through the new ventilation system of the X-Bionic® RunningGear jacket the runner is able to create his special “air circulation system.” The uniqueness of this jacket lies in its innovative flap system, which is easy to handle, but at the same time highly effective. In a matter of seconds these climate slats afford a dry ventilation of the whole upper part of the body. The overlapping slats, the so-called “flaps” located at the chest, neck, and back, can be individually adjusted while running and can be fixed drawn up or down. The evaporated sweat can be regulated by the position of the flaps. AirGuides in the form of climate channels inside continuously carry the evaporated sweat to these “flaps”. From “blast airing” to “sustained cooling” when jogging – the choice now lies in your hands, even in rain.