Even though ExOfficio designed it for travel, the Men's Give-N-Go T-Shirt is just as good for hiking and climbing thanks to its lightweight, stretchy fabric. Its highly breathable Give-N-Go stretch fabric wicks moisture, dries very quickly, and provides a full range of motion. ExOfficio treated this baselayer with Silvadur for odor-resistance, and mesh panels ensure airflow when you're working up a sweat.