Cloth is good. Hemp is even better because its not only light but its > Earth friendly! Kind of like Subarus. I hear they're made out of hemp. > I rememeber spilling on the engine block of my old suby while changing the oil; smoke hemp. In all seriousness, I rarely wear a helmet canyoneering. I always wear one biking, and almost always in the mountains, but climbing and in canyons I think it's a reasonable judgement call. Getting away from the main thrust of this thread, and into well trodden terrain, but sanctimoniousness is perhaps my least favorite mask.