Oakley is know for their lens technology and they bring the ability to customize your XS 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. Oakley XS O Frame Lens Details: Clear Lens: Allows maximum amount of light to transmit for most accurate view. 90% light transmission Gray Lens: Medium light with a neutral transmission for truer color perception. 50% light transmission. Dark Gray Lens: Medium to bright light with a neutral transmission for truer color perception. 24% light transmission