Hawke Frontier HD X 10x42 Binocular- GreenProduct Description: The lightweight and durable magnesium alloy chassis is protected by a green rubberized armor that is textured for a nonslip grip. The optical tubes are nitrogen filled and O ring sealed to be waterproof and resistant to internal fogging when moving through extreme changes in temperature or environmental conditions. A right eye diopter adjustment and twist up eyecups allow the binoculars to be customized to most people's needs and