Compact, lightweight and ergonomically engineered, the PRAKTICA Marine Flotilla 10x30 binoculars are the logical choice for sailing, boating and other rugged outdoor activities. Fully multi-coated optics and BAK-4 glass maximise light transmission for clear, bright images while the optical system provides the power and focus needed to spot fast moving objects quickly and easily. No need to worry about sudden temperature changes or water splash thanks to the nitrogen purged interior.