My problem with them is taking them off and putting them on. This is done under the head (sometimes with rotors turning). My greatest fear is these light weight, synthetic sods blowing away and going through the disk or entering the engine. Another problem is the only place to store them is in the dock pocket. On landing, I open the door to cool down and "wham" bright yellow FOD buzzing around. Surly some reflective tape sewn into uniform flight suits around the wrists and ankles would be better.
ITI