I agree with every thing that has been said but I would like to add what has saved me in a down pour. It was my full face helmet that had the feature of opening the front so that it became an effective visor to keep the rain off of my glasses! Whenever I ride and find my glasses or goggles getting foggy,( usually when it is cold out), I find that to be dangerous. When my glasses were getting droplets on them in that down pour my vision was seriously distorted on that busy highway. When I opened my visor to where it prevented the rain from blurring my vision, from that point on I could at least see where I was going! Btw, my buddy who was riding with me on that trip said that he was following me because he couldn't see where he was going!!