Trying to do some research on snowboarding helmets that are certified for cycling. I think anything CPSC certified is safe for cycling, since there doesn't appear to be a snowboarding or skiing certification, but I'm not sure. I've found one Giro helmet that's explicitly certified for cycling, and a couple other helmets from other brands that list CPSC certification, but not the sport the CPSC certified them for.
Anyone have more knowledge of how the certifications work?