Now Adjustable Another CMC Rescue innovation thoroughly field tested by CMC Rescue School instructors and now widely being used by rescuers worldwide, the newly adjustable Sunbrero fits over your helmet to block the sun from your face, ears, and the back of your neck. Its black undersurface prevents sun reflection, and it also works well in the rain. Made of durable, 1,000-denier CORDURA® nylon fabric, the improved Sunbrero now features a wider elastic band with hook-and-loop adjustability, which grips securely to the headlamp retainer clips on most helmets. Working-At-Height / Industrial Rope Access / Technical Rope Rescue Working at height requires reliable, quality equipment. The SunbreroTM rescue helmet sun visor can be used with confidence in work-at-height maneuvers for industrial rope access or technical rope rescue when used in accordance with the regulatory safety standards it falls under. Always use life safety equipment and gear according to the regulatory safety standards for which it is classified and/or certified.