if you're concerned about safety ratings don't get some of the ones that are only certified as hard hats, i think bern makes some. they look like sick helmets but they arent as safe. it depends on what you want: comfort, safety, style, weight.  chances are obviously that you want all 4, but there's some prioritization involved in those categories. so my advice is not to get it if its just a hard hat, and that might mean you're sacrificing steeze and lightness.