Zeal Optics Portal XL Dark Night. Expanding (literally) on their award-winning Portal, Portal XL provides the biggest vistas ever. Packing all the same great features as the Portal, including Zeal Optics patent-pending Rail Lock System, the Zeal Optics Portal XL provides a larger fit with more coverage for face shots. The vertical Rail Lock System makes changing your lenses on the go a breeze, and it allows you to vent your lenses while hiking, or on the deepest, wettest days for fog-free skiing and snowboarding, that lets you keep charging while others are sidelined by fogged out lenses.LensThe Phoenix is rising to meet your needs. From flat light to partly-sunny days, this lens has you covered from the inside and gives a bright outlook to onlookers.