Vortex Optics Viper Hd 10 x 42 Roof Prism Binocular with Harness Strap O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments and argon gas purging delivers fogproof, waterproof performance XR Fully multi-coated on all air-to-glass surfaces increases light transmission while dielectric prism coatings provide bright, clear, color accurate images High density extra-low dispersion glass delivers impressive resolution and color fidelity, resulting in high definition images Rainguard, tethered objective lens covers, comfort neck strap, and deluxe padded carry case are all included in the box