509 Delta V Commander Helmet Sizing

Getting the right size helmet isn't rocket science, unless it's the Delta V Commander! This helmet is special, because of the inflatable ear seals. I don't think there's another helmet like it in the snowmobile world.

Unfortunately, 509's own web site is of little use in trying to find the right size - their sizing charts are way out of sync with this helmet. I don't understand it, because it seems like such a simple thing to do - make the Delta V Command match up with the sizes on the web site.

Anyway, I hope this video helps people figure out the size they need. I also highly recommend seeing the helmet in person and asking a dealer to help you get the right size.