When daylight dims and shadows deepen, the X Factor of the Vortex Viper binoculars goes to work for you. Rivaling higher-priced European binoculars, XD glass, XR coatings, and phase-corrected prisms deliver extra-high resolution and increased light transmittance- rendering brighter views than one would expect from binoculars in this class.
Vortex knows there will be times when it's just plain hard to keep a handle on things ... that's why the Vipers feature XP engineering. This design anchors the prisms in place, in spite of rough handling, for years of exceptional viewing. Let it rain. Let it snow. Let the wind blow up a dust storm. Nothing gets past the Viper- these binoculars are absolutely dust proof, fog proof, and waterproof.