The 4D MAG from Smith is a very complete pair of ski goggles. The 4D Mag features the latest BirdsEye Vision technology. This technology ensures that you have even wider and improved vision (25% more than Smith's I/O MAG!). In addition, the ski goggles are equipped with the evolved MAG technology with dual locking system, which makes changing the lens even faster and easier. The goggles themselves also adapt to your face thanks to the Responsive Fit technology, ensuring an optimal fit. These goggles have a spherical lens that is made using TLT technology, so you always get a crystal clear image and the image is distorted as little as possible. The Porex filter also ensures that the goggles adapt to the ambient pressure, so you also keep a clear image when it really matters, for example during fast descents. Another addition to the 4D MAG is that it uses the AirEvac system, which provides even better ventilation and even less chance of condensation. The special ChromaPop lenses have the ability to filter light at two frequencies. The lenses are therefore suitable for a wider range of weather conditions. The goggles are equipped with a ChromaPop Sun Platinum Mirror lens, which falls into category S3 and has a VLT of 13%. The ski goggles are therefore ideally suited for (very) sunny days with clear blue skies. The ski goggles come with an extra ChromaPop Storm Rose Flash lens. This lens falls into category S1 and has a VLT of 50%. The lens is therefore very suitable on cloudy days.