Lightweight and breathable, on and off the track. The On x POST ARCHIVE FACTION Running-T. Materials & Transparency Key features - Weight: Noneg - Limited-edition POST ARCHIVE FACTION design - Lightweight and integrated back slit for airflow - Back panel bonded for a streamline silhouette - Eye-catching reflective dots - Made for running and transitional moments - Mesh inserts and gusset down the side for breathability