100% waterproof, fogproof, and shockproof performance Premium Bak-4 prismsFully coated or Multicoated optics Soft Texture Grip for sure grip even when wetLarge center-focus knob for easy adjustment FOV = Field of view at 1000 yards These binoculars are made for the elements. Whether you find yourself in rain, fog, a stream, or a lake, don't worry about water on your next outdoors excursion with the Bushnell H2O binoculars. Impenetrable O-ring sealing and nitrogen purging make the H20 and its top-of-the-line optics waterproof and fogproof, completely locking out moisture no matter what you fall into or what falls on you. Expect top images and maximum light transmission, rain or shine, from the premium BaK-4 prisms and fully or multicoated optics. Covered with rubber armoring for shock absorption, it also features exterior Soft Texture Grip to keep them in your hands even in wet, slippery conditions. Features fold-down eyecups and a large center-focus knob for easy adjustment. Compact models (8x25mm, 10x25mm, and 12x25mm) offer fully coated lenses. Full size models (8x42mm and 10x42mm) offer multi-coated lenses and twist-up eyecups.