The Nikon 10x50 Trailblazer ATB is a slim yet rugged binocular. It is fogproof, waterproof and delivers high optical performance. This binocular is a good choice for outdoor enthusiasts. Its multicoated optics produces crisp and sharp views. The 10x50 Trailblazer features BaK4 prisms to deliver excellent image quality and accurate color. This series uses arsenic free Eco-Glass optics and is truly environmentally friendly.