Few things. I work as a FF in a city and cover highrises,a bandana could be very usefull imho. dusk mask for sure and hands free as opposed to holding your shirt collar over your nose as you run,crawl,climb etc.

Also a good door stop right? stairway doors lock behind you once you enter, thats it till the ground floor, well what if your not sure of conditons in the stairway and don't want to be locked in just yet ? Well plug the latch hole with the bandana and check things out. Beats using a shoe...I've pulled people out of stairways laying face down sucking air ? dirt off the floor, bet they'd like a bandana.

I use mine a lot for day to day stuff, wiping sweat, drying off chairs,covering my bald head from the sun from time to time, works as gauze in a pinch. keeps my 1 cell light from rolling out of my pocket now as i carry them togather.

The biggest thing is to learn your highrise. Do your doors lock behind you in the stairways? What are the stairways called? A/B North/South 1/2 ? you need to know as the FD will assign one for attack and one for escape, although you may have to use whats close. Do they have smoke towers in them ?

If a firm has many floors do they have private stairways between their own floors ? That could be a lifesaver.
Does your build use a vanity address? You can call your building " One Union Square" but if the real address is 666 Skidrow,well it would be nice to tell 911 that one.

Years ago Chicago FD drove around not finding the address given for a highrise fire because of this.