Another CMC innovation thoroughly field tested by CMC School instructors and being used by rescuers worldwide, the 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. 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. It also works well in the rain!