Bell segment helmet flexible flight the new bell segment utilizes a series of interior eps foam segments connected by a reinforcing skeleton allowing the helmet to flex and conform to your head while still meeting safety standards including the astm f2032 bmx enhancement features abs hard plastic shell segmented eps linerweight 410 gramsvents 8certification astm f2032 06 ce en1078 cpsc bicycle segmented eps liner interior eps foam segments are connected by the reinforcing skeleton makin