Whether you're trail running or backpacking, stay cool, dry, and focused on what's ahead with the Mammut Men's MTR 141 Half-Zip Short-Sleeve T-Shirt. The light, stretchy fabric wicks sweat and dries rapidly for cool-wearing comfort, and flatlock seams won't rub or chafe. The 1/2-zip front offers quick ventilation when things heat up. A PURE antimicrobial treatment adds odor-resistant performance, and reflective logos help you stay visible after sundown.