This mod adds Altyn helmet as a standalone mask. Doesn't offer any benefits, but doesn't really make you breathe like an asthmatic either.

I thought that it wouldn't look as good without balaclava, but if you don't share this sentiment, you can easily disable it (or you can disable the helmet instead). In order to disable balaclava, simply go to Altyn/assets/units/mods/masks/msk_altyn/ and open *msk_altyn_novisor.object (for no visor variant)/msk_altyn_visor_dn.object (for variant with the visor down)/msk_altyn_visor_up.object (for variant with the visor up)* with a text editor of your choice and replace true in <object name="g_balaclava" enabled="true" /> with false.