Triathlete Magazine details the new Lazer Wasp Air Tri helmet from the Interbike show:
The shell has two methods of heat relief. As expected, the vent on top provides air flow. When you need more relief, you can click out the two-position lens to create an air passage between the top of the lens and from rim of the helmet.
Want additional cooling? Lazer has what it calls an aquavent on top of the helmet. Water can be squirted into the port, channels inside send water around the head and out the back. Wet head, dry eyes.
More details on the Lazer Wasp Air Tri to come soon!