The Nikon ACULON A211 10 x 42 Porro Prism Binoculars feature lead- and arsenic-free, fog-proof Eco-Glass™ lenses and multicoated BaK-4 porro prisms that provide high-quality images under a multitude of lighting conditions. The rubber armor-coated, water-resistant exterior is rugged and easy to grip in wet conditions, and the matte finish won't give away your position. Twist-up eyecups offer comfortable viewing, and the center-focus knob is easy to adjust. Includes a neck strap, lens covers and a padded carry case.