Petzl Meteor

Light, like it's almost not there. asy adjustment for fit. Seems fragile.

Light, like it is not there. Easy adjustment for fit. Not bulky, so it won't get in the way of your climbing.

I'm not a fan of the magnetic chin strap because you have to baby the helmet to make sure you don't get it dirty. When the magnetic strap gets dirt or dust in it, it doesn't always hold well, and this could happen if you simply put your helmet on the ground for a brief respite.

While being lightweight is a plus, it also has a potential downside. The helmet seems fragile, so don't put it in the bottom of your day pack with a bunch of stuff on top or sit on it when you rest or toss it to the ground. Problem is that I don't like to baby my equipment when I'm in the field and not using it.