With the 4D Mag ski goggle, you'll see the slopes like never before! The BirdEye Vision technology increases your field of vision by 25% compared to the I/O. You also get a magnetic interchangeable lens system featuring 8 magnets strategically placed around the lens that maintain it against the frame and a mechanical to lock it together for maximum security. Even better, you can use this quick and intuitive system with your gloves on. The frame is very comfortable thanks to a soft and waterproof triple-density foam offering a perfect fit. The lens for its part, is packed with high-end technologies: the TLT technology reduces distortion and eye fatigue for an enhance visual comfort. The 5X anti-fog technology for its part ensures you always enjoy a crystal-clear vision thanks to a proper ventilation. To top it all, the ChromaPop technology considerably enhances contrasts for a unique visual experience. A second lens (category 1) is included for bad-weather days.  The ChromaPop Sun Red Mirror is ideal for sunny days with its category-3 lens. The mirror effect brings a nice classy touch all while protecting you from glare. Goggles Smith ---4D Mag Gold Bar Chromapop Sun Black + Chromapop Storm Rose Flash