Most manufacturers cover their binoculars in protective synthetic material or rubber, but some go that extra mile protecting their instruments as good as possible. These binoculars are known as “armored binoculars” and quite a number of binoculars actually have the word “armored” in the name of the product!
This ranges from budget priced Nikon 7238 Action Ex Extreme 8 X 40 mm All Terrain Binoculars on the one hand, to the Leica Ultravid HD 10×42 Black Rubber Armored Binoculars on the high end.
One brand name which is accociated with armored binoculars is Steiner, in particular in their military/marine series. These are all high quality binoculars and worth considering. The entire ATB (“all-terrain binoculars”) series by Nikon is claimed to be exceptional rugged: “A new body style provides unparalleled strength and ruggedness in a package that is comfortable to carry all day. With rugged rubber armor for added durability and a firm grip even in the worst conditions, Nikon guarantees every ATB to be 100% waterproof and fogproof, each is backed by Nikon’s 25 Year Limited Warranty and No-Fault Repair/Replacement Policy.” (Quote by Nikon). They are all worth considering.
Armoring protects the instrument from scratches and – very important – from bumps, which could harm the inner workings of the binocular. However, don’t be fooled: No binocular can ever be 100% “shockproof”, even though some manufacturers may make such claims.