I have two Halos. They are not perfect, but it is the best solution I have experienced, and I have tried a lot of different headbands.
What I do is wring one Halo out when it is very saturated, hang it in two loops around my handlebar to dry out, and wear the second one. I have used this solution on centuries, and it is an almost perfect solution. As one person pointed out, they do get saturated, and when they do, sweat can find their way around the rubber channels.
I am still angry though that they charge $12.95 for those little dinky headbands. I hated paying for them, but what can I do? I sometimes feel like a sucker, for being a bicyclist. At least that is the way the bicycle industry vendors make me feel sometimes, due to their price gouging. Sorry for the rant.
Regards,