Technology has been vastly improved over the years.
His first costume was hardly bulletproof if I remember right. All the tech was in his belt.
Nowadays:
"The Batman's costume serves many functions beyond concealing his identity and providing a distinctive appearance. Its material is Nomex lined with triple-weave Kevlar, and the cape has had its points weighted. The cowl has a Kevlar lining and additional trauma plates to protect his forehead and throat. The eye slits have Starlite nightvision lenses that can be activated with voice control, and also contain a field of view display projector. A radio transceiver is built into the cowl with a throat mic that allows for subvocalized transmission, and the suit has electronic cooling systems and inertial navigation unit built into it. The wiring provides the feed for a built-in taser system that can deliver one rechargeable 50,000-volt, low-amperage shock to anyone in contact with him.
Batman keeps several additional versions of the Batsuit on hand for special use in unique environments, such as long underwater diving, toxic or oxygen-less atmospheres, and exo-skeleton-supported battle armor for use against particularly deadly metahuman foes. These are always the exception to the rule, however, and take more time to be replaced if damaged or destroyed in the field."
cool very cool, hey do u have the namor aquamn fight can u scan it for me please dont worry i disaggree with that win namor cant be beat by that but can u scan it anway u dont have to post the wale bit but u savengers have to stick together
Capatain America hasnt as far as I know, in a way hulk hsant changed, hes just had differnt incarnations, its more like he's had differnt characters, but never realy an upgrade so to speak.
Wolverine? O guess the writers just make him unofficially stronge and stronger so he shouldnt count! Hey, how about Beast... oh, he had tyhatb formula. Mystiqque? Toad? Sabretooth? Magbneto (I know he got uber powerful on Kick but that isnt upgrade...), Human Torch, Thing, John Sttewart, and... J. JHonah Jamesson? Is that OK? Correct me if some have had upgerdes...
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Thanks to Badwolf for the great sig!
As far as I know, the Silver Surfer has never had an upgrade. Yes, many will say he doesn't need one, but considering how much power he had lost in his early years, it might've been nice, somewhere between then and now, for the writers to have mentioned his de-powering, with a consequent re-powering once he was free again. Seems just a lot of stuff was assumed. Either that, or I missed something, in which case I would appreciate if someone enlightened me.
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Shinier than a speeding bullet.