The I/O MAG is the magnetic version of the high-end Smith I/O ski goggles. This model features the Smith Mag technology with a double locking system and 8 magnetic contact points for quick and simple lens swaps. On the other hand, the ChromaPop interchangeable spherical lenses included with this model feature the TLT technology and a Porex filter, offering a perfectly sharp vision and preventing the optical distortions caused by altitude changes. In addition, thanks to the 5X anti-fogging internal lens, you benefit from the best anti-fogging coating from Smith, so that fog never impers your vision. Features of the Smith I/O Mag:  Medium fit Frameless lens for a better design Responsive Fit frame: adapts to your face to offer comfort and precision QuickFit strap adjustment  Double strap adjustment: better adjustability  Ultra-wide strap with silicone insert for better grip DriWix three-layer face foam: absorbs moisture to prevent fogging Designed for a perfect fit with Smith helmets (comfort, venting and anti-fogging performance) Comes with a microfibre pouch Goggles Smith ---I/O Mag White Vapor Chromapop Everyday Rose Gold Mirror + Chromapop Storm Blue Sensor Mirror