In Hi-Visibility colour for visibility in daylight. Compatible with Endurance, Height Endurance, Peak View and PS51 helmets. Caution: Attenuation performance varies depending on the helmet model it is used with. Technical data: Compatible with most helmets. Excellent level of attenuation. Easy to attach. Hi-Visibility colour for visibility in daylight. Adjustable dual pin system provides multiple positioning for better fit. Rest position for intermittent use. CE-CAT III.