Kowa SV II 10x50 BinocularsThe Kowa SV II 10x50 Binoculars are designed for the outdoors. They have a durable polycarbonate body that is O ring sealed and nitrogen purged, and the external lens surfaces are coated with Kowa's KR coating which repels water and dust. The optics are fully multi coated and the prisms are phase corrected BaK 4, all of which delivers bright, sharp, constrasty images to your eyes.