The silicon ï¿½gutterï¿½ works well at redirecting sweat. The headband material absorbs sweat, but holds it rather than wicking away to evaporate. Eventually, the amount of sweat in the headband is more than the gutter can handle and it runs down the forehead.
I still need to wipe my eye clear earing the Halo as it can't keep up with my sweat output. While riding in the heat, hills and humidity I still get a a river of sweat in my eyes.
Road bike riding in Louisiana summer heat and humidity is a challenge itself. The Halo head band is the answer to keep sweat out of your eyes. I recommend this head band to everyone trying to keep their eyes on the road.
I used the Halo II on a long ride and a hot day where an absorbent head band was really needed. The Halo II is not very absorbent and the barrier doesn't work adequately to keep the sweat from running down your face into the eyes. I used a skull cap that worked better than the Hallo II. This might work better on short rides when profuse sweating is not a factor.