A fitting assembly for a helmet having an interiorly located forehead dome and side sections. A crown pad provided with adjusting straps engages retention clips on the side sections to set the vertical position of the helmet. A nape panel provided with adjusting straps engages additional retention clips...http://www.google.com.tw/patents/US6279172?utm_source=gb-gplus-share專利 US6279172 - Custom fitting assembly for helmet
