Green light is preferred by hunters and fishermen because it is a very soft light that will not spook their prey. Green also does not attract insects like white or yellow light does. It is not easily picked up, unless looking directly at it, so it is useful in covert operations. It is also useful in smoke or fog filled environments. Green is also very popular for night time map reading. Olight Filters use a high quality TPU body construction which offers flexibility, durability, chemical and abrasion resistance. The lens of the Olight filters are made of ground glass. Lenses feature a top quality anti-reflective coating on BOTH SIDES for optimum light transmission. A lanyard loop offers convenience.