While these helmets provide some protection, don't think they're on the level of a similarly-priced motorcycle helmet. I asked about DOT and Snell certification at OSH and the Bonehead people were up front about how they wouldn't pass that sort of testing because the helmets aren't lined with impact-absorbant foam. They can't have the foam because that would make them too tall for most cockpits. I'm not sure how they get around that problem in race cars.
They look like they should be helpful against lacerations like the gross one on Page 1 of this thread. But I'm not sure how much protection you'd get from blunt trauma. Some, probably. Just be aware that these are basically "skid lids," not "crash helmets."







