its just examples of the Rescue Jacket and how a Seaoned Pilot was able to negotiate the wind with the Rescue Jacket and had the confidence to take it down to 39% knowing that the Rescue Jacket would catch the wind on the way back giving him more speed to get back as he shows.
If you are going to land with 0% Battery in front of a Gator filled lake, its a great idea to have a Rescue Jacket. lol
Phantomrain.org
Wet Suits to fly in the Rain. Land on the Water, Capture the Storm and fly over gators.
But, the added area didn't "catch" more wind and increase the speed of the aircraft. Whether flying upwind or downwind, the added area and drag slow the aircraft, or increase energy usage if the aircraft is flown at the same speed.
Range will be greater without the added weight and drag from the attached foam pieces.