The Julbo Optical Clip is a prescription carrier that sits behind your sunglasses, between your eyes and the lens. It attaches securely to the nose bridge, so it is simple to install and easy to remove for cleaning — a cost-effective way to wear your correction with Julbo performance eyewear. Your optician glazes the clip with your prescription. Prescription installation is not included and must be carried out by your eye care provider. Fits Standard Fit — frames with the Julbo 3D Fit Nose: Aero, Aerolite, Aerospeed, Outline, Race 2.0, Rival, Rush, Ultimate. Low Bridge Fit — the Low Bridge Fit (Asian Fit) versions of those frames. Specifications Lens width: 45 mm Lens height: 35 mm Bridge: 25 mm