The 7x magnification is ideal for extended viewing on unstable platforms. Hermetically sealed - Airtight, watertight construction enables binoculars to float if dropped overboard; resists saltwater corrosion. Non-slip/non-skid rubber armor - Protects binoculars from impact and provides sure grip in damp marine environments. Bushnell Marine 7x50mm Blue Binoculars 137501