The Trijicon HD Binoculars are specifically designed with the hunter and tactical shooter in mind as they are excellent in low-light conditions, have a great field of view and allow for fine and deliberate focus adjustments. The solid magnesium body and rubberized coating provide the means for a lightweight but durable binocular. Features include fully broadband multi-coated fluoride lenses for superior light transmission and picture, balanced weight to aid in comfortable usage, a slim and compact design, a center focus knob, and a 1/4″-20 threaded tripod adapter. These binoculars are dry-nitrogren filled and waterproof. A vented, moisture-wicking Trijicon harness strap is included with these binoculars. The harness helps transfer the weight of the optic from your neck to your back to provide better comfort for all-day use.