Buying filters in Riga.... Help needed.

[Attmouse]

On the internet and on many forums they say you can buy filters in Riga, and it is a good idea to load up on them. My problem: I can't buy filters in Riga. Yes, i've found the armory, though there is no option to buy filters, only medkits. Is it a bug, or something? Please help me.

[Cursed Hawkins]

Riga doesn't have you going up to the Surface yet if i remember the Armory is when you can find Filters in the Shop!
Edit: and by Armory i mean the Station called Armory!

[Reinborn]

The first station where you can buy filters is the Market where you get to with Bourbon. It is right before going up the surface so there is really no reason to buy it in Riga anyway. Also I'm not entirely sure whether you can buy them in Riga or not.

You will only need to use your mask while with Bourbon (before Market) just once if I'm right (correct me if not) and that's right before the Hanza train searches for bandits after you fight off the monsters.
Either way, take it easy. I haven't bought anything in Riga myself anyway on both of my runs, just make sure to stock up on the Market level if you play on survival mode.