沒遮到耳朵的那種半罩
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那種叫雪帽，屬哈利帽進階版的一種吧。保護力仍嫌不夠。
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有遮到耳朵且有面罩卻沒下巴那一橫的安全帽，這算全罩半罩?
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算四分之三半罩，如果很怕熱的話。其實可以戴這種，不過對下巴保護力實在不足
以顏面受傷比例來講，有35%下巴受傷情況是最嚴重的。就像有一些車友常講的，如果今天他沒戴全罩的話。他的下巴就毀了。
我想這一些資料都是真實的。也不是我自己亂講的。我附上一些相關圖片跟資料
頭部受創的機率研究圖
The diagrams above show the impact areas on crash-involved motorcycle helmets. (Source: Dietmar Otte, Medizinische Hochschule Hannover, Abteilung Verkehrsunfallforschung, Germany.) Note that 35% of all crashes showed major impact on the chin-bar area. This means that if you ride with an open-face helmet, you are accepting only 65% of the protection that could be available to your head.
If you ride with a shorty or half helmet, you are accepting only 39% of the protection you could obtain. You are literally throwing away 61% of the protection you would have had had you chosen a full-face helmet.
And, of course, if you ride wearing a “novelty” helmet or no helmet at all then you have none of the protection you could have chosen.
下巴部位受創的機率是35%
如果你只戴了半罩式安全帽,那麼你只保護到39%的部位
出處來源
http://jeff.dean.home.att.net/swisher.htm