With these high-quality, reliable binoculars, you’ll never miss the action. Fogproof, nitrogen-purged, waterproof construction takes on rain or spray with no problem and remain clear in tough conditions. Great for inland water use, sporting events or bird watching, these compact, lightweight optics have fully coated lenses with BK-7 roof prisms, precision ground from boro-silicate glass for clear images. Waterproof housing is rubber-armored for long-lasting durability. 6mm twist-up eyepiece and 16mm eye relief.