The airbrake idea is genius
I've used these goggles for a season, and loved them from the start. They come with 2 lenses so you don't have to pay extra for another one. They take like 15 seconds to switch out. I recommend to not rub the lens on a shirt or coat, because the anti-fog might begin to fail. I'm planning on using these for a long time. It helps if you're on a mountain with lights so at night you can change it to see better.