The result of CFD (computational fluid dynamics) testing, the Propel sunglasses introduce the concept of aerodynamic gains to eyewear. Shaped to sit close to the face and to help push air away from the ears, the new sunglasses use a trailing edge on each side of the lens for the effective management of airflow over the shoulders.The Propel sunglasses feature Clarity lenses to ensure vision is always at its sharpest, and are constructed with a biogrilamid frame. Three sizes of nose bridge are included, so it is easy to find a comfortable and secure fit on most face shapes. The temples are fully adjustable in both length and grip for absolute comfort.Exceptional field of viewA wide lens gives an exceptional field of view with no obstruction from the frame.Biogrilamid frameLightweight, strong, durable and made from majority renewable sources.Interchangeable nosepieceThree nosepiece sizes are provided so each user can find a comfortable fit.UV 400Complete UVA and UVB protection.Interchange