Great safety and comfort. In our world, crashes are a reality. Give yourself the best possible chance of keeping trauma to a minimum, buy the best helmet you can find to protect your head and . Leatt helmets feature category-defining 360 Turbine Technology, the helmet is lined with 360 turbines, which are discs constructed from an energy-absorbing material designed to allow the head to move slightly inside the helmet during a crash . This technology has two key advantages, the reduction of rotational acceleration to the head and and the absorption of energy upon impact at level. The 3.5 is both ECE and DOT certified. If you are looking for a helmet kit with free goggles take a look at the 3.5, or if you want increased ventilation and Leatts Pro-Fit liner, as well as free goggles, check out the 7.5, 8.5 and 9.5 models.