The 20 x 80 WP Cosmos, BAK-4, w/ Premium Carrying Case is engineered to perform at its best under astronomical viewing and long-distance terrestrial observation under low-light conditions, these binoculars are truly out of this world. It features BAK-4 prisms with multi-coated optics that result in remarkably crisp and clear images. It features a nitrogen-purged body that is 100% waterproof and fog proof with a beautiful black metal finish, the Cosmos series imposes a lasting impression of strength and precision. Adjustments such as individual focused eyecups, lets you customize these binoculars to your personal preference. Built to withstand the darkness of space, 20 x 80 WP Cosmos, BAK-4, w/ Premium Carrying Case is great, whether you want to immerse yourself and take in the vastness of the Milky Way, or a mountain range under moonlight, these binoculars will be with you from one celestial environment to the next. Includes premium carrying case and neck strap.