The Abyss binoculars deliver a great performance in every marine and boating environment thanks to their waterproof and nitrogen purged construction, coupled with green lenses that help cut glare over water or snow. SPECS - Waterproof/fogproof- Nitrogen filled- Bak-4 Prisms- Special coated optics- Rubber covered- Dark Green Coating on eyepieces and objectives- Enlarged eyepieces- Roll-down eyecups