Simply put the Anon M4 Toric Goggles give you nothing but the best because your gear shouldn't hold you back no matter the conditions. Equipped with MAGNA-TECH® technology, you can choose between two included lens tints to ensure your vision is tailor-matched to the weather. But if the clouds roll in, or out, while you're on the mountain, you can easily swap to the other lens without even taking the goggles off. MAGNA-TECH® really is that good. Plus there's MFI®, which also uses magnets but this time they are there to hold the included MFI® facemask in place with no gaps and no fogging issues.