Bushnell's Trophy Bone Collector high-power, variable scope features the Multi-X Crosshair reticle, which offers a classic sight picture; waterproof construction- O-ring sealed optics stay dry inside, even when totally immersed in water; fog-proofing - Argon-filled optics remain stable regardless of ambient temperature for the ultimate fog-proof protection and fully Multi Coated- multiple layers of anti-reflective coating on all air-to-glass surfaces deliver bright, high-contrast images.