The Bushnell H2O 8x42mm Porro Binocular (Clamshell Packaging) is the ideal size for all around use. Although designed and constructed for boating enthusiasts this waterproof binocular would be equally at home anywhere; whether on the trail, for hunting or at the Super Bowl. They have been o-ring sealed for worry free use on the ocean, a river or lake. Nitrogen purged to prevent fogging and moisture build up on cold, damp mornings or in misty bays and harbors, they are the ideal aquatic scope. Soft, ridged rubber armoring not only protects the optics but provide a firm, slip-free grip even when wet. Twist-up eyecups and a large center-focus wheel top off this feature full binocular for universal utilization.