well I have created a list reviewing the capabilities of the batman costume in earth one and new earth, for those who are interested (counting the batman regular series and detective comics):

Earth 1:

-from 1970 to 1979 it was a normal suit without any special capacity

-the end of 1979 in batman 312 it is mentioned that the cape can be used as a glider

-1980 in detective comics 496 it is said that the suit is fireproof, although according to gerry conway in detective comics 506 only the cape was treated with chemical fire retardants

-1983 in detective comics 523 batman faces solomon grundy and when fighting near a furnace the cape catches fire, curiously the comic was also written by gerry conway

conclusion: most of the time it was an ordinary suit, and at the end of the 70s and the beginning of the 80s some special features were added, although it was not very regular

batman new earth:

- 1987 if we take into account what was written by mike w barr in detective comics 571, although after year one was written by him and draftsman by alan davis (tec 569-574, the presentation of the new batman) remained in a black hole of continuity , the cape is not fireproof.

-1988-1989 no mention is made of any special capacity of the suit, although in detective comics 583 it can be seen that it extinguishes the flames of the beard of an old man with his cape (I suppose he could have done it with any normal fabric in the same way without it suffering much damage) and detective 590 throws the suit to the fire at the end of the chapter and this is set fire normally

-1990 in batman 444 is mentioned for the first time in the regular series (after tdkr) that has a kevlar plate under the symbol of the bat and that the hood is reinforced, in the same comic at the end the suit is set on fire and must roll to turn it off

in batman 454 it is explicitly mentioned that the layer is fireproof, henceforth it will always be like this, although in batman 466 the cape suffers fire damage, but it may be that the layer is damaged but it does not catch fire I suppose since later in detective 661 (knighfall) when batman fight with firefly and this shoots at batman with his flamethrower the cape protects him but is a bit damaged

-1992 detective 646 states that batman wears polarized lenses on the hood, which until now had nothing, were white only by representation and detective 653 is established that has a radio on the hood, which until now had always carried in the belt, in the history the sword of azrael it is mentioned again that the suit is fireproof and that the hood offers protection against blows

-1994 in batman 515 batman says that now the gloves are isolated against electricity and some writers state that the layer is bulletproof although for others it is not

-2000 in Batman 575 shows that the hood has kevlar and supports the impact of low caliber projectiles

-2003 Batman 609 establishes that in addition to the night vision batman has thermal vision and protection in case someone wants to remove the suit without authorization

-2008 in the return of ra's al ghul it is mentioned that it has a built-in sonar for orientation

2011-The batman inc can release gas by the gloves in addition to contain all the above mentioned

conclusion: the first years was an ordinary suit and from 1990 it began to add more and more things

(sorry for the english I used the google translator)