Motorcycle Helmet Z1r

Motorcycle helmets -- quality vs price?

I'm just getting into riding and I'm shopping helmets. There are a couple more expensive models (hundred dollar range) I've seen that I like the style, and others that are a lot cheaper (fifty dollar range) but basically similar style. Generally, is

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Once they have reached a certain level of safety rating there is little to choose from them in terms of protection, but there is in longevity and usability, the more expensive lids tend to be easier to replace the visor and padding, like the cheek pads