The newest addition for Barska binoculars is their Crossover series. Engineered to perform at its best under harsh conditions, these binoculars are truly the next generation of binoculars. Features BAK-4 prisms and are fully multi-coated optics that result in remarkably bright images. Keep your view in focus with the large center focus knob. Featuring nitrogen-purged body that is 100% waterproof and fogproof, non-slip and shock absorbing rubber armor provides a firm grip. Adjustments such as twist-up eyecups and right eye diopter let you customize these binoculars to your personal preference. Whether your hiking, birdwatching, or hunting these binoculars will crossover from one environment to the next. Protected by Barska's limited lifetime warranty.