In really hot weather, city commuting, I like to ride with my visor up. Sometimes I'll just take the entire visor off the helmet. In place of the visor I wear cheap, foam sealing, sunglasses instead. The kind Harley riders wear with their half helmets. You get cool air flow to the face this way but don't give up the protection of a chin bar. Yellow tinted glasses are great as they work great at night under the street lights but also provide some sun shade during sunny days and enhance contrast.
The only downside I've found with this is my Sena 10 is so overwhelmed with wind noise it is unusable until the visor is reinstalled. I however do not seem to find the increased wind noise bothersome at speeds up to 50mph/85kph.
Another option I've heard of for commuting is people doing basically what I do, but with an off road helmet which provides more air flow and no visor, as well as better sun shade with the peak.
Last edited by twowheels; 07-25-2018 at 12:50 AM.