Celestron 71370 8x42 Granite Binocular (Black) Fully Multi-Coated for enhanced light transmission BaK-4 Prisms with High Reflectivity and Vivid Colors Binocular Harness Strap - comfortable and keeps the binoculars handy Metal construction in the Focus Knob, Diopter Ring, and Twist-Up Eyecups for long life and precision movement Waterproof and Fogproof - nitrogen purged to prevent internal fogging in all weather conditions Eco-Friendly - lead and arsenic free