The Celestron Nature DX 10x42 Binoculars are a portable and rugged pair of binoculars, designed with the outdoor enthusiast in mind. These binos are waterproof and feature rubber armouring for protection and comfortable holding, while they are also fogproof and nitrogen-purged. To help you achieve bright and detailed views in even the trickiest conditions, these Celestron binos include Bak-4 prisms and fully-coated optics. With 10x magnification and generous 42mm objective lenses, this product is great for general-purpose viewing, and for spotting subjects in their natural habitat.