Alpen Teton ED HD BAK4 Fully Multi-Coated Optics, Waterproof / Fogproof  Roof Prism Binoculars - Includes Alpen&rsquo;s No-Fault, No-Problem ED HD Optics Waterproof Binocular BAK4 Optics Alpen's No-Fault, No-Problem Lifetime Warranty