Scientifically Engineered Lens Colors - designed to heighten the human eye's ability to clearly distinguish underwater structure and fish in all weather conditions. Bi-Gradient Mirror Treatment - in addition to providing protection from direct sunlight from above, this special treatment also provides that extra protection from light bouncing off the water Super Hydrophobic Coating - Repels oils, dust and water, preventing water spots and making the lens easier to clean. Anti-Reflective Coating - Prevents light from bouncing off the rear of the lens to the eye, resulting in a clearer, non-distorted image.