Cruise into peak performance mode with a hat that's as fast as you feel. The RRS Endorphin 5 Panel Hat 2.0 brings lightweight airflow, laser-cut ventilation, and sleek side panels that wick sweat like a champ. A retooled fit and secure silicone tab closure means zero distractions, even when you're in the zone. Better yet, that sweet silver reflective logo keeps you visible when you're chasing miles before sunrise or after dark.