The Comp series are developed specifically for racing. Poc’s double lens construction has superior polymer materials as well as anti-fog and anti-scratch treatments.TECHNICAL SPECIFICATIONS:- Polycarbonate (PC) outer lens.- Cellulose propionate (CP) inner lens.- Anti-scratch and anti-fog treated.- Soft coated polyurethane (PU) frame.LENS SPECIFICATIONS:- Brown VLT 17%, CAT 3- Smokey Yellow VLT 42%, CAT 1- Clear VLT 85%, CAT 0IMPORTANT LENS COMPATIBILITY UPDATE:- As from Wheels 16 and Snow 16/17, all Poc Goggles and lenses will be 1,8 mm thick, for most models this means enhanced durability and a more robust lens attachment. For all versions of below goggles and lenses this also means an update of the lens attachment - For these models, old frames and lenses are incompatible with new frames and lenses. - All new lenses will have a + sign to ensure there is no confusion about whether you have an old or new version.With Poc Iris Comp Spare Lens Zeiss S, it guarantees the best running & triathlon equipment. In addition, at Poc reliable reputation Chicago you can find the best quality with best prices of the sector. Choose us as your running & triathlon store and focus only on enjoying of the comfort that the best brands give you like Poc. Our team of running & triathlon experts share their honest reviews to help you make the best decision. All this to ensure you get the cheapest Glasses deal every time.