Arcteryx’s pinnacle long-sleeve mountain running shirt, the Norvan DownWord is made for long runs.

Its hybrid construction combines our soft, high-performance Phasic FL fabric with our ultralight Delta mesh on the back for improved airflow.

Merrow seams and laminated finishes in key areas minimize chafe, the design rides comfortably under a hydration vest, and the patterning removes restriction.

And for the runs that push into the night a large reflective logo improves visibility.