Features the Circle-X which offers a classic sight picture. 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. Argon Purged Fog-Proofing – Argon-filled optics remain stable regardless of ambient temperature for the ultimate fog-proof protection. Includes a Circle-X crosshair reticle. Mfg: Bushnell