?? MSA retro-reflective stripes help enhance the visibility of workers in nighttime or low-light conditions, such as dawn, dusk, or night ?? Durable material ?? Stripes available for sale as self-applied. However, MSA recommends installation by qualified MSA personnel as we pre-treat all helmets prior to striping with an electrical discharge treatment to enhance the ability of the stripes adhesive bonds. ?? ELECTROSTATIC-INERIS Certificate