Nimbus, I think... I bought them a few years ago, they're at the end of their life.
I'm running in the Ragnar Key West relay next weekend. 12 people, 200 miles, from Fort Lauderdale to KW.
I've been looking around for a decent helmet for autocross & track. I used to use my motorcycle helmets, but they're heavy & don't provide enough peripheral. I just registered for an autocross event with a Corvette group here locally that's going on the weekend of the 12th.