The Nitro 10X36 features ED Prime glass, EXO Barrier lens coating, BAK-4 phase-coated prisms and fully multi-coated lenses for superior contrast and resolution in low light conditions. Lightweight, compact, and waterproof, this binocular is a game for use in any condition. ED Prime Glass Bushnell's highest quality glass delivers amazing colour, resolution and contrast, even in low-light conditions. Exclusive EXO Barrier Protection Bushnell's newest and best protective lens coating molecularly bonds to the glass, repelling water, oil, dust, debris and preventing scratches. PC-3 Phase Coating Applied to the prisms, it enhances resolution and contrast. IPX7 Waterproof construction O-ring sealed optics stay dry inside when immersed in three feet of water for up to 30 minutes.