Say your in the field with your red-tail and you keep working downwind. You end up a lot further from your truck then you antisipated. Now you call the bird down to end the day because no game is out today, but you have a 20 min walk back to the car into 25 mph winds that came out of nowwhere. You can struggle to hold your bird that is tryng to fly everywhere, walk backwards and use your body the shield from the wind, or with a 20min walk ahead slip on the hood and get back with an arm that doesn't feel like its been attatched to a kite in a hurricane. Just one example of many and thats with a red-tail now try it with a longwing which could be a walk a whole lot further then that.