Bushnell Spectator Sport 10x50 BinocularsSPECTATOR SPORT BINOCULARS, 10X50MM #BS11050 Non slip rubber armor Protects binoculars from impact and provides sure grip in damp marine environments. PermaFocus Technology Keeps distant objects permanently in focus, eliminating the need for constant adjustment. Nitrogen Purged Fog Proofing Nitrogen inside the scope ensures interior optical surfaces won't fog due to humidity or rapid temperature change. Multi Coated Optics Multiple layers of coatings