The Forge binoculars feature BaK 4 Abbe Koenig prisms and Ultra-Wideband lens coatings provide increased light transmission while ED Prime glass and PC3 phase coating offers high resolution and color contrast in low light so hunters, shooters, and outdoorsman never miss a moment. IPX7 Waterproof construction, O-ring sealed optics stay dry inside, when immersed in three feet of water for up to 30 minutes.