Date: 12/31/1969 Views: 3114
Date: 10/24/2011 Views: 5506
Date: 12/31/1999 Views: 2934
Date: 08/23/2023 Views: 197493
Vent open. These things are VERY effective at directing a significant volume of cooling air at the occupants. I have flown in Rich Schultz's tri and he has them. They WORK!