Compare a Motorcycle Helmet with a bike helmet. Motorcycle helmets can go as high as $500 or more but those are full face with shields and nice helmets made by composite material and without a bunch of holes.
Aren't bike helmets overpriced? I think so, A top of the line bike helmet can cost up to $120 dollars but what you get is compacted foam covered whit a thin plastic cover and plastic and vinyl straps. For that same price you can get a Motorcycle helmet that covers your hole head and back of the neck and includes face shield. I'm not saying that I'm going to ride my bike with a motorcycle helmet I just saying that companies are abusive with their prices. "oh you are not forced to buy one" you can say, but here you have to wear a helmet by law. Again the construction and materials that you are getting on a bike helmet does not cost more than $40 and I'm talking about a top of the line Gyro or Bell.