If you are looking for a snowmobile helmet cam there are a few things to consider.  First, you should always use lithium batteries in your snowmobile helmet cam since normal alkaline batteries will not last very long in the cold.  Second, a snowmobile helmet cam should have an easy on switch that you can easily manipulate with gloves on.  The VholdR Helmet Cam and The Twenty20 Contour HD Helmet Cam are great for snowmobiling since the on / off slip mechanism can be easily manipulated.  Third, you want to ensure your snowmobile helmet cam does not restrict your range of motion since this can be very dangerous.  We recommend the VholdR Helmet cam or the Contour HD Helmet cam if you are looking for a traditional helmet mounted helmet cam since these are very light weight units that have no external cords.  Another option is the GoPro Motorsports helmet cam since the large suction cup can be easily mounted to the hood of your snowmobile to capture some great POV Video.  If you have any questions regarding what the best helmet cam set up for your application would be please do not hesitate to contact us at Helmet Cam Live.  At helmet cam live we spend a big chunk of the winter in northern Michigan out on our snowmobiles so if you have any questions about what helmet cam works best on a snowmobile please let us know.