The Foresta Binocular Series feature lightweight and durable die-cast bodies made of aluminum encased in a rubber armored housing. Each optical system is nitrogen filled to help eliminate dewing and is fully waterproof. All air-to-glass surfaces of these binoculars are multicoated for maximum light transmission and contrast. This binocular design features an exceptionally clear field of view. The unique hinge lock system allows you to easily adjust your inter pupillary distance. An outdoor hiking-style carrying case is included, along with lens caps and straps.