Tunnel protectors are built right into the sled. Heat exchanger tubes running the lenght of the tunnel are right over the track windows. It is pretty brilliant.
We stopped to eat and noticed other riders coming in with snow jammed in their helmets, jackets and gloves. They had snow everywhere. We looked out the door and couldn't see across the street. Six inches of snow fell while we ate a few burgers. That was the start of a great ride.