The Military-Marine binocular is adapted for rugged all-around use. It is light and easy to handle with bright images and a wide field of view for steady viewing even on the move. The floating prism system uses flexible silicone lens mount to absorb severe shock impact and abuse without damage while the Sports-Auto Focus System lets you focus each eyepiece to your vision once then keeps images razor sharp from 20 yards to infinity. The Military-Marine features a Makrolon housing a durable polycarbonate with NBR Long Life rubber armoring creating a lightweight rugged chassis that withstands 11 Gs of impact. Includes comfort neck strap objective covers rain protection cap and carry case.