The Nikon Ecobins 10 x 25 binoculars are made with lead-free optics, non-chloride rubber, no harmful inks or dyes and a natural-fiber case, all while offering legendary Nikon performance and quality. Free of lead and arsenic, the multicoated Eco-Glass optics provide bright images and glare reduction BaK4 high-index prisms maintain a clear, crisp image. Quick central focusing offers fast subject acquisition close focus distance of 9.8 ft. lets you study nature up close. Long eye relief of 13mm accommodates the use of eyewear turn-and-slide rubber eyecups with multiclick adjustments are eyeglass-friendly. Nitrogen-filled and O-ring sealed construction offers waterproof, fogproof protection durable rubber-armored coating provides a nonslip grip, wet or dry. Includes lens caps, carrying case and neck strap.