Looks like the HCI helmet has been recalled by the manufacturer:
http://thekneeslider.com/archives/2008/10/07/hci-50-helmet-recall/Quote:
The HCI-50 is advertised as being DOT approved. Most comfortable, low profile helmet I ever owned. Just passing info, don't want to start a full, 3/4, half-shell debate.
Regards,
Tom
