High Vis Vest

I have started wearing the high visibility vest on my motorcycle.  And from time to time, the velcro comes undone, and the vest would start flapping in the wind. 
Having wind through the clothes is one of the joy of motorcycling, but not when it affect visibility.  It affected my rear-view visibility, especially in the dark, when I need it most.  So then the vest flapped, I thought the cars behind were flashing at me.
I must remember to fasten my clothing up properly!