Arai XD4 Depart Helmet All Arai Helmets are constructed with premium technology, and the Arai XD4 Depart Helmet is no exception! The shell is constructed using a very strong and lightweight fiberglass composite material. This allows for great protection and minimizes strain or discomfort in the neck. The Arai XD4 Depart Helmet is DOT and SNELL approved. Now, you may be thinking --- a lot of helmets have both of these ratings, what makes the Arai better? The Arai difference is that these standards are not only met, but they are exceeded by a very significant amount. In house standards have proven time and time again that Arai helmets are the flagship protective helmet. Put all of this technology into the XD4 and you've got a premium sport-touring/adventure/dual-purpose helmet. What are you waiting for?