The "Kassensturz" has devoted itself to the topic of ski and snowboard helmets. Image: ShutterstockGood head protection is essential when skiing and snowboarding. Head injuries are still relatively common in snow sports, so a good helmet makes a significant contribution to reducing risk. The "Kassensturz" and the "K-Tipp" have devoted an article to ski and snowboard helmets just in time for the start of the season. Ten of the best-selling helmet…