The sieve on top of my shoulders seems to have retained someone asking about HB helmets a while back. Have a look at this if you're interested. A bit pricey though if you buy from the maker. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140166493440 " target="_blank"> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140166493440