Allow breathmasks to be fitted into other masks

[salix_catus]

Okay, then we can add breath masks to face masks because it makes as much sense as slapping armor on a biosuit or something.

Exactly what I meant. all it is is basically a cosmetic change to your breathmask.

[Frank_Stein]

Wait, I have an idea. What if there was an achievement skin that turns breath masks, gasmasks, and voice changers into clown/horse masks?

[DyssalC]

Wait, I have an idea. What if there was an achievement skin that turns breath masks, gasmasks, and voice changers into clown/horse masks?

Horse mask already works as internals.

It's the clown mask, balaclava, George Melons mask, skull mask, and face mustache that don't function as internals.