Made for exploration, the Zero Tube monocular from Nocs is rugged, compact, and capable. It has multi-coated, extra-low dispersion optics that reduce reflections while enhancing color and contrast, with a twisting eyecup that extends or retracts as needed and nitrogen-filled chambers to ward off fog. A ribbed non-slip grip helps keep things in hand, but its IPX7 waterproof rating means it can withstand a drop or two should it slip away.