Designed to be air tight, so moisture stays out even when submerged in water.

• Designed to be air tight, so moisture stays out even when submerged in water.Black with Straight eyepiece
• Waterproof Construction - O-ring sealed optics stay dry inside, even when totally immersed in water.
• Fully Multi Coated - Multiple layers of anti-reflective coating on all air-to-glass surfaces deliver bright, high-contrast images.