Batman has accumulated a lot of injuries over the years, from numerous bullet wounds, to knife scars, stab wounds and broken bones aplenty. His more recent Batsuits have evolved to incorporate a neck brace (Dark Victory) and, following his broken back at the hands of Bane in Knightfall, a back brace as well (Batman & Son). The boots and gauntlets will also insulate Batman in case he is electrocuted (Leaves of Grass, Batman Incorporated), which happens more often than you might think. In addition, the Bat-logo on The Dark Knights chest is heavily shielded (The Dark Knight Returns, Batman Reborn) and is designed to draw fire away from Batmans face and head. It can also release an electrical charge to an assailant if Batman is rendered unconscious (Hush). The cowl is armour plated, but doesnt provide as much protection as is perhaps necessary, given that Bats is frequently banged on the head, or grazed by a stray bullet and, as a result, knocked thoroughly senseless. However, the helmet will withstand the jaws of a puma (Knightfall) a dose of highly corrosive acid (Death of the Family) and, if tampered with, can release a concussive blast of gas to disable the would-be attacker (Hush). The suit itself is also thickly-layered enough to slow a bullet and provide some protection from fire, blades and hard impacts. Really, why are you picking a fight with this guy?