Yeah, what bigbulls said. I shot feathers and they definitely control your arrow very well. I currently am running 4" vanes with as much helical as I can get, and they are doing a very good job. I shoot full length arrows, such is the problem with my 32" draw, so I need all the control I can get, and the 4" does the job for me. I was shooting at 65 yards this past weekend, and they did well in that area too.