These nikon high grade lightweight compact binoculars have a sturdy and lightweight design made from die cast magnesium alloy body these binoculars are eco friendly using non vinyl chloride materials a high light transmission is acheived by nikons original multilayer coatings providing excellent colour reproduction these binoculars are waterproof and fog free and have o ring seals and nitrogen gasthese high grade binoculars are designed for a broad range of outdoor applications from bird