Fujinon 7x50WP XL Mariner binoculars are unsinkable, perfectly water tight under pressure and thank to its relative light weight, they never sink. Even without their waterproof shoulder strap, Fujinon 7x50WP XL Mariner binoculars always float. With its 7x zoom and 50 mm objective, the Mariner gives you a detailed and precise image, even with poor ambient lighting.