When you wreck your sled, and your head slams into the ground, you will want that insulation.
I don't think you can even buy a double layer shield for that helmet. I don't see it on any of the list I have here of HJC stuff. Check it out online and get back to us to see if you can even get that shield.
This is a pretty stupid thread anyways.. you can just cancel your bid on ebay. It goes on your feedback history but no biggy as long as you don't do it all the time. I did it once before. Now I am alot more carefull when I bid. I bid on something that a guy said would fit my sled.. I posted on here and everyone told me it wouldln't. So, I cancelled my bid for it.
Cancel the bid.. and spend that money on a helmet that is made for what you want to use it for. Even if you buy that helmet you have to spend $$ on the correct shield in the least.
Ok.. I think I might have found your auction http://cgi.ebay.com/ebaymotors/HJC-C-12-Motorcycle-Helmet-XL-w-gloves_W0QQcmdZViewItemQQcategoryZ6749QQihZ009QQitemZ190057523163QQrdZ1QQsspagenameZWDVW
Thats the only C12 I can find on ebay. And now I am on HJC's website, I don't even see where they make sled helmets. They used to make a "cirrus" brand.. thats what I have and like. My motorcycle helmets are both HJC also. CL-15 in black.. and CL-15 Session in pink for my girl.. I have another sled helmet for her thats a bieffe.. so I misspoke earlier.. I have 3 hjc and one bieffe..
Here are some thread for you I found online for you to form your own opinion. But I think my opinion is a credible source, as am an avid user of BOTH style helmets.
Here is a guy that uses the CL12 for snow and road. Here is a quote from there "the HJC CL-12 is sold in both a motorcycle version and a snowmobile version" http://www.off-road.com/snowmobile/reviews/2001/hjc/hjc_cl12_review.htm
Here is a thread on SF where a guy has a CS12 and runs it as a sled helmet. But you said yours is a C-12..
Here is the difference between Snell ratings and DOT ratings.. http://www.helmetsetc.com/snell-vs-dot.asp
no, here's the helmet i bought, i just need to buy an electric shield for it now. won't be a bad helmet for $160. http://cm.ebay.com/cm/ck/1065-29392-2357-0?uid=121984574&site=0&ver=EOIBSA080805&lk=URL&Item=320062034792
I can tell from looking at the EBay pic's, that helmet takes the same shield as My CL-Max modular.
A new double pane from Dennis Kirk cost's $34.99, The electric shield from Dennis Kirk cost's $84.99
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