Yep. This is too much of reflection for the driver's eyes.

In the old not so good days a driver could encounter at night a horse driven buggy with no lights or reflective elements whatsoever. Just few days ago at night while going downhill on a steep road I have seen a well camouflaged hiker walking on my side of the road and stepping aside luckily in time.

I will take reflective vest on a biker/pedestrian/hell, even on a horse anytime I am driving/biking and can hit them after spotting them too late.