The Nikon Ecobins 10x25 binoculars are designed from top to bottom with the latest eco friendly features while still maintaining the highest level of optics that make Nikon Ecobins world-famous. The Ecobins binoculars feature Eco-Glass lead-free and arsenic-free lenses and prisms. Additionally, only non-chloride rubber and no harmful inks or dyes are used during production. The carrying case and the binocular strap that come with the ecobins binoculars are made from a fully biodegradable Lenzing TENCEL fiber. The TENCEL fiber is derived from wood pulp of sustainable eucalyptus forests and utilizes an innovative manufacturing process with minimal waste. Other premium optics features include aspherical eyepiece lenses that provide distortion-free viewing, internal blackening to minimize light loss and multi-coated lenses that offer maximum brightness, contrast and true color. Whether you’re an avid bird watcher or hunter, or perhaps just someone who appreciates nature, you can join Nikon in their commitment to protect the environment and become a nature’s advocate.