Outdoor Research Argon Long-Sleeve T-Shirt - Men's Mars, M

With AirVent technology, the Argon has superpowered wicking and drying abilities, keeping us cool and relaxed through every lung-burning sprint, every jelly-leg-inducing trek, and every pump-fest climb. No matter our pursuit, we move freely and stay chafe free in the stretchy, flat-seam construction, while the anti-odor treatment staves off the stink.