Remain dry – even when active. The extremely breathable Mammut Men's MTR 141 1/2 Zip T-Shirt is the answer to sweaty trail running courses. The Adaptive system by HeiQ is integrated into the material and has been designed for dynamic moisture management. This means that the material actively adapts to and regulates your body temperature while you are running. A high level of comfort is provided by the soft, elastic jersey material, which is also very fast-drying, and a Pure anti-microbial treatment reduces perspiration odours.