Oakley is known for their lens technology and they bring the ability to customize your MX O Frame goggles to match your riding terrain and conditions. Oakley produces their O Frame® lens out of optically pure Lexan® for unobstructed vision but maintaining 100% UV protection and durable impact resistance. The O Frame lens is equipped with tear off posts. Blue Lens: Flat to medium light that boosts contrast. 56% light transmission. Gray Lens: Medium light with a neutral transmission for truer color perception. 50% light transmission. Black Iridium Lens: Medium to bright with the advantage of Iridium® to improve acuity and turther tune contrast while reducing glare in bright conditions. 25% light transmission Clear Lens: Allows maximum amount of light to transmit for most accurate view. 90% light transmission