Never mind smoke, wait ’til sweat gets in your eyes. Tears, according to the song that became popular even before Nike manufactured its first-ever shoe, you cannot hide.
Nothing gets you off your rhythm as having to stop in the middle of the run because of burning and stinging sensations in your eyes caused by sweat. And with no water in sight, relief would have to wait at the next water station or even at the finish line.
Most running caps and visors have sweat bands that minimize if not stop sweat from getting into your eyes. But if you were to choose between buying a visor or a running cap, get a visor. Ironman Noy Jopson says he prefers a visor because he can pour water on his head and the heat dissipates easily.
But for heavy sweaters like me, the sweat blocking feature of Halo head gear is really magical. I use a Halo tie even if I wear running caps and have never had sweat getting into my eyes, which used to immobilize me in my runs.