Julbo has released these ultra-lightweight sunglasses packed with features.  Weighing in at only 8g, the lenses are made from virtually unbreakable NXT, they have a wide view angle through the photochromatic lenses. Called Zebra lens technology, they claim they can adapt to light conditions from 59% transmission in bright conditions to 95% transmission in dark conditions, and they can cover that range in as little as 22 seconds.
They have a lifelong anti-fog treatment and the photochromatic dye is supposedly infused (with lasers!) into the lenses, not as a coating that can scratch or wear off. Adjustable ear loops allow them to fit securely on a wide variety of faces.  MSRP is $120 USD.
